The Bacalar spearheads a return to coachbuilding by Bentley Mulliner and features an enhanced version of Bentley’s peerless 6.0-litre W12 TSI engine, the most advanced 12-cylinder engine in the world.

Since the first introduction of the twin-turbocharger W12 in 2003, the engine’s refinement has seen an increase of up to 27 percent in power, 38 percent in torque and a reduction of 38 percent in emissions.

This has been realised through the evolution and optimisation of the crankcase, improvements in the oil and cooling systems, twin-scroll turbocharging technology and more effective injection and combustion processes.

Sources from Bentley told this correspondent that these improvements resulted from several initiatives taken by the company. It may be recalled that the latest generation of W12 was launched in the Bentayga in 2016. “A thoroughly reworked engine included a crankcase 30 percent stronger than its predecessor, while the cylinder surfaces were coated to reduce friction and improve corrosion resistance. A low-alloy steel coating is applied to the bores using an Atmospheric Plasma Spray (APS) process. Improvements were also made to the cooling system, with the engine featuring three separate coolant circuits. The first is designed to bring the cylinder heads up to optimum operating temperature as quickly as possible for best engine performance and low emissions. The second cool the engine block and oil system, while the third handles the turbochargers’ thermal load. Each system has a dedicated water pump, allowing optimised individual control,” sources said.

Twin-scroll Turbocharging

Twin-scroll turbochargers minimise turbo response time and provide a more efficient exhaust package. The exhaust assemblies for the three front and three rear cylinders are separate from one another, which feed the twin-scroll impellers. The turbocharger housing is welded directly to the exhaust manifolds and feature integrated speed sensors, allowing the engine to monitor turbo performance for maximum efficiency.

Effective Injection

The W12 combines high-pressure direct fuel injection (200 bar injection pressure) with low-pressure port injection (six bar). The combination of these two systems maximises refinement, lowers particulate emissions and optimises power and torque delivery.

Interestingly, each W12 engine is hand-built over 6.5 hours by a team of 45 craftspeople before undertaking a highly sophisticated test regime of over an hour via three specialist diagnostic machines during the engines assemble.

According to the sources, there were three specialist diagnostic machines with sophisticated test regime.

Leak Test

The leakage test is conducted by pressurising each of the systems for fuel, oil and water individually. The different cavities are pressurised to values between 0.2 – 5.0 bar respectively and then measured whilst the pressure decays over time. The reduction in pressure versus time represents the quality of the sealing of the engine assembly. If the pressure drops faster than expected, a leak is indicated. A special fluid is sprayed on to the exterior of the engine to pin-point any leakage paths.

Cold Test

The engine is loaded on to a testbed plate, and connections are made to the engine loom and all engine systems, whilst a large electric motor couples to the engine via the crankshaft. “Motoring” the engine via the crankshaft allows the testbed to collect data from a suite of sensors. The facility measures 600 individual properties and characteristics of the engine during a 15-minute cycle. Due to the low running speed of 120 RPM for the test, finer details and any inconsistencies can be identified thanks to a sample rate that highlights even the briefest of anomalies that would be invisible if the engine was firing or running at speed. This fine detail analysis is also valuable for confirming the precise timing of the engine. Using positioning information from sensors on the crankshaft, crankcase and camshafts, and cylinder compression values, the Cold Test can confirm the engine timing is accurate and, therefore, achieve the best possible combustion cycle.

Hot Test

When the engine arrives for hot testing, a UV dye is added to the engine to help identify any leaks. The coolant and fuel system are pressurised with air and nitrogen, respectively, for a final check before introducing the necessary fluids ready for testing. The engine is cranked to build oil pressure before the ignition system is energised and then left to idle whilst the engine test technician listens for any refinement issues and checks for leaks with a UV lamp. Sources said that each W12 is then tested for a minimum of 21.5 minutes and runs up to 3,800 rpm with a maximum load of 300 Nm. One in every one hundred engines receives a full eight-hour power test, achieving 6,000 RPM, and must achieve 900Nm.

The three tests that the Bacalar engine has already been put through are part of Bentley’s exceptional quality control processes. These testing procedures provide feedback on the quality of each engine and provide multiple checkpoints to catalogue the exact behaviour of each engine from the moment of manufacture. Since the installation of the three testbeds in 2002, over 100,000 W12 engines have been handcrafted in Crewe and passed through the test facility.

Technology Advancements

Bentley’s legendary 6.0-litre twin-turbocharged W12, created in 2002, has evolved into the latest iteration of the W12 engine used across today’s current model range. The unique W-configuration means that the engine is 24 percent shorter than an equivalent V12, benefitting packaging and maximising usable cabin space.

The latest generation of W12 was launched in the Bentayga in 2016. A thoroughly reworked engine included a crankcase 30 percent stronger than its predecessor, while the cylinder surfaces were coated to reduce friction and improve corrosion resistance. A low-alloy steel coating is applied to the bores using an Atmospheric Plasma Spray (APS) process.

The W12 combines high-pressure direct fuel injection (200 bar injection pressure) with low-pressure port injection (six bar). The combination of these two systems maximises refinement, lowers particulate emissions and optimises power and torque delivery.

Twin-scroll turbochargers minimise turbo response time and provide a more efficient exhaust package. The exhaust assemblies for the three front and three rear cylinders are separate from one another, which then feed the twin-scroll impellers. The turbocharger housing is welded directly to the exhaust manifolds and feature integrated speed sensors, allowing the engine to monitor turbo performance for maximum efficiency.

Bentley’s variable displacement system shuts down half of the engine under defined conditions. Intake and exhaust valves, fuel injection and ignition are all shut down on defined cylinders, with the engine running as a six-cylinder for improved efficiency. The system will run in this mode in gears three to eight, below 3,000 rpm and up to 300 Nm torque output.

The first Bacalar engine followed the same build process in Bentley’s centre of excellence for W12 engines, ensuring the same level of quality and expertise before final testing, sources added. (MT)

Sustainable, Recyclable Electric Motors

Bentley Motors has announced a three-year research study that aims to revolutionise the sustainability of electric motors. Supporting Bentley’s commitment to offering only hybrid or electric vehicles by 2026, the result could see recycled rare-earth magnets used in selected ancillary motors for the very first time.

The study, titled RaRE (Rare-earth Recycling for E-machines), intends to build on work completed at the University of Birmingham in devising a method of extracting magnets from waste electronics. The project will also scale up this process and repurpose the extracted magnetic material into new recyclable magnets for use within bespoke ancillary motors.

Adding to the sustainability benefits that RaRE will provide, the bespoke motors created through this method promise to minimise complexity through manufacture while supporting the development of the UK supply chain for both mass production and low volume components.

Dr Matthias Rabe, Member of the Board for Engineering, Bentley Motors, said, “As we accelerate our journey to electrification, offering only hybrid or electric vehicles by 2026, and full electric by 2030, it is important that we focus on every aspect of vehicle sustainability, including sustainable methods of sourcing materials and components. RaRE promises a step-change in electrical recyclability, providing a source of truly bespoke, low voltage motors for a number of different applications, and we are confident the results will provide a basis for fully sustainable electric drives.”

This study will run in parallel to Bentley’s OCTOPUS research programme, which aims to deliver a breakthrough in e-axle electric powertrains, utilising a fully integrated, free from rare-earth magnet e-axle that supports electric vehicle architectures.

As with OCTOPUS, RaRE is an OZEV funded project delivered in partnership with Innovate UK, which brings together the following partners with distinct roles and responsibilities. Bentley Motors will lead specification setting and test protocol development and support the design and manufacturing activities, while Hypromag will scale up the recycling processes developed at the University of Birmingham and convert the extracted powders to sintered magnets with properties designed around those required for the auxiliary motors. On its part, Unipart Powertrain Applications Ltd will lead the development of manufacturing scale-up routes to ensure facilities and processes defined are suitable for volume automotive manufacture.

Advanced Electric Machines Research Ltd will lead the motors’ design and development, while Intelligent Lifecycle Solutions Ltd will pre-process computer hard disk drives to remove the rare earth magnet containing components from the waste, which will be shipped to Hypromag for removal of the rare earth magnets. The University of Birmingham will provide cast alloys, which will be fed into Hypromag to blend with secondary materials to produce sintered magnets. (MT)

Comments (0)

ADD COMMENT

Link Copied!

German luxury car brand Audi has launched Audi A4 Signature Edition at INR 5.71 million (ex-showroom).The A4 Signature Edition features distinctive styling enhancements, including Audi rings entry LED lamps, exclusive Audi rings decals and dynamic wheel hub caps.

The company stated that the luxury car will be available in limited units and comes with five colour choices: Glacier White Metallic, Mythos Black Metallic, Navarra Blue Metallic, Progressive Red Metallic and Manhattan Grey Metallic.

Balbir Singh Dhillon, Head of Audi India, said, “The Audi A4 has been one of the best-selling sedans in our line-up, combining dynamic performance with sophisticated elegance. With the launch of the Signature Edition, we’re offering our customers a chance to own an even more exclusive variant, distinguished by bespoke styling elements that elevate its premium appeal. The Audi A4 Signature Edition is crafted for discerning customers who value refined aesthetics and seek to make a sophisticated statement through their choice of vehicle.”

Some of the key highlights of the Audi A4 includes –

• Park Assist with 360–degree camera (new)
• New decorative inlays in wood oak, natural grey (new)
• Audi rings entry LED lamps that create a striking welcome light projection (new)
• Distinctive Audi rings decals for enhanced brand presence (new)
• Dynamic wheel hub caps that maintain the perfect Audi logo orientation regardless of wheel motion (new)
• Premium fragrance dispenser for enhanced cabin ambience (new)
• Aerodynamic spoiler lip for a more dynamic profile (new)
• Key cover in customisable colour options for a premium touch to your vehicle access (new)
• Stainless steel pedal covers add a sporty interior accent (new)
• Special alloy wheel paint design for a striking appearance (new)

The Audi A4 is powered by a 2.0L TFSI engine that churns out 204 hp (150kW) and 320 Nm torque. A zero to 100 kmph in just 7.1 seconds and it has a top speed of 241 kmph. It features a 12V Mild Hybrid System that reduces fuel consumption, brake recuperation enhances the overall fuel efficiency, B&O Premium sound system with 3D sound – with 19 speakers including a centre speaker and subwoofer, 16-channel amplifier and an output of 755 watts.

Comments (0)

ADD COMMENT

Link Copied!

Hyundai Motor India (HMIL) has expanded its Alcazar SUV range with a new Corporate variant with diesel powertrain at prices starting INR 1.78 million and an expansion of automatic transmission options in the Prestige DCT Petrol (7-speed) at INR 1.86 million.

The Alcazar Corporate variant is equipped with a voice-enabled smart Panoramic Sunroof and is available with both 6-speed Manual and 6-speed Automatic transmission choices, and is designed to appeal to the evolving aspirations of Indian SUV buyers.

Tarun Garg, Whole-Time Director and Chief Operating Officer, Hyundai Motor India, said, “At Hyundai Motor India, we are continuously listening to customer feedback and evolving our product offerings to meet their aspirations. The introduction of the Corporate variant in Alcazar Diesel with a voice enabled smart panoramic sunroof and the inclusion of DCT in the Prestige Petrol variant reflects our commitment to providing a more personalized and premium SUV experience. With these updates, we aim to offer more choice and delight to our customers who seek performance, technology and sophistication in their vehicles.”

Comments (0)

ADD COMMENT

Link Copied!

When Tata Motors launched the Harrier.ev, it wasn’t just introducing another electric vehicle — it was signalling a shift in India’s premium electric vehicle landscape. Based on Tata’s Gen 2 EV (acti.ev+) architecture, the Harrier.ev blends familiarity with futuristic design, making electrification a natural progression rather than a disruptive leap.

Interestingly, the company is providing a lifetime warranty on the battery for the first vehicle owners, applicable only to private owners. 

Anand Kulkarni, Chief Product Officer, Tata Passenger Electric Mobility, told Motoring Trends, “We have said that our Gen 2 approach is basically a pure EV approach. Much the same way, the acti.ev+, in fact, we have taken that architecture further ahead on the Harrier.ev to make sure that you can get the seating comfort of a regular SUV without any compromise on the battery or powertrain.”

While rivals explore born-electric platforms from scratch, Tata’s strategy with the Harrier.ev is different – marrying known aesthetics with a ground-up EV design. That’s not just a technical decision, but as Kulkarni stated, it’s rooted in customer behaviour.

“There is a section of people who are saying, who want the comfort and the familiarity of the product that they are using. So we have ​made a product that retains that familiarity, while giving them the benefits of electrification,” Kulkarni explained.

The Harrier.ev isn’t just about powertrains and batteries – it’s about creating a ‘third space.’ With features like a 14.5-inch Neo QLED screen and Dolby audio, Tata wants the Harrier.ev to be as comfortable and connected as a living room.

“You have office, you have home, and everything in between is where you spend a lot of time in the car. People expect it to be comfortable, convenient, connected and safe,” Kulkarni said.

Even as the EV market rapidly matures, Tata remains mindful of long-term viability. Decisions around battery size, AWD vs FWD configurations, and software-driven features were all taken with a delicate balance of affordability and future-readiness in mind.

“We worked with two sizes of batteries. This was about making the right choices,” said Kulkarni, noting how Tata’s dual-battery strategy is now industry standard.

As Kulkarni explained, For Tata, the Harrier.ev is more than a product – it's a culmination of years of foresight, strategic evolution and a deep understanding of the Indian consumer. It’s a vehicle that reflects not just where the market is headed, but how Tata Motors is determined to lead it there.

Comments (0)

ADD COMMENT

Link Copied!

Toyota Kirloskar Motor (TKM) has launched the Fortuner and Legender in a new Neo Drive in a hybrid avatar, featuring a 48-volt system that delivers improved fuel efficiency. The models are priced at INR 4.47 million and INR 5.09 million, respectively.  

Since its debut in 2009, the Toyota Fortuner has defined the premium SUV segment in India, admired for its rugged design, robust performance and unmatched all-terrain capabilities. The stylish and feature-rich Legender complements the Fortuner, exemplifying Toyota’s core values of quality, durability and reliability. Together, they have cultivated a loyal following among urban adventurers and off-road enthusiasts alike.

The new Neo Drive variants introduce Toyota’s advanced 2.8-litre, four-cylinder turbo-diesel engine paired with a 48V system comprising a belt-integrated starter generator and lithium-ion battery. This technology mirrors hybrid electric systems by recuperating braking energy during deceleration, contributing to smoother low-end acceleration, quieter operation and improved fuel efficiency. The Smart Idle Start-Stop function further enhances efficiency by automatically shutting off the engine when stationary, resulting in lower emissions and fuel savings.

Importantly, the company claims that these enhancements do not compromise the Fortuner and Legender’s formidable payload capacity, durability or off-road performance. The Multi-Terrain Select system optimises throttle response, braking and traction control to deliver a superior driving experience across diverse terrains.

On the design front, the Fortuner retains its bold, purposeful stance, ideal for rugged adventures, while the Legender exudes a more dynamic and premium appeal with dual-tone body colours, split LED headlamps and a sleek fascia. Both models offer dual-tone leather upholstery, soft-touch materials and ergonomic seating designed for long-distance comfort.

In terms of safety the SUVs come with ABS, Vehicle Stability Control with Brake Assist, WIL Concept Seats, Hill Assist Control, Traction Control and more. Toyota’s focus on customer convenience extends to tailored finance solutions, including up to 8-year funding plans, Toyota Smart Balloon Finance and pre-approved value-added services such as extended warranty and genuine accessories. Buyers will also benefit from five years of complimentary roadside assistance and a standard 3-year/100,000 km warranty, extendable to 5 years/220,000 km, along with the customisable Toyota Smiles Plus service package.

Varinder Wadhwa, Vice President, Sales-Service-Used Car Business, Toyota Kirloskar Motor, said, “As the SUV market in India grows steadily, customers are seeking advanced features and differentiated styling. The new Fortuner and Legender Neo Drive variants meet these expectations with bold design, powerful performance, and comprehensive features, underscoring Toyota’s commitment to delivering ever-better cars and advancing towards carbon neutrality.”

Bookings for the Fortuner and Legender Neo Drive variants commenced on 2 June 2025, with deliveries set to begin from the third week of June.

Comments (0)

ADD COMMENT

Link Copied!