Lexus LFA supercar unleashed

Constructed using advanced carbon fibre technology, the rear-wheel drive LFA is powered by a bespoke, high-revving 552bhp 4.8-litre naturally aspirated V10 engine, matched to a rear-mounted six-speed sequential automatic transmission, giving 200mph-plus performance.

Keeping the car’s weight to an absolute minimum was one of the defining elements in the development of the LFA and this led to the decision to switch from using aluminium for the car’s construction to advanced Carbon Fibre Reinforced Plastic (CFRP) for the chassis and bodywork.

Moreover, Lexus decided the CFRP structure should be built in-house rather than by a third-party supplier. In doing so, it drew on Toyota Motor Corporation’s heritage in textile weaving technology to push the boundaries of its technical abilities, developing new carbon fibre looms and a laser system for monitoring the integrity of the material.

At four times the strength of aluminium, CFRP gives the LFA an exceptionally stiff and strong structure, and also delivers major weight advantages, saving around 100kg on an equivalent aluminium body. CFRP accounts for 65 per cent of the body-in-white, with aluminium alloy used for the remaining 35 per cent.

Unlike the few other vehicles on the market that use CFRP construction, the LFA uses the same advanced resin technology favoured by cutting-edge aerospace programmes for its unmatched weight and strength properties.

The heart of the LFA is a bespoke, naturally aspirated V10 engine that sets new standards for compact dimensions, lightweight architecture and scintillating performance according to Lexus. From the outset it was determined the engine should have a 4,805cc capacity, develop 552bhp and rev to a wailing 9,000rpm red line. A 72-degree angle between the cylinder heads is ideal for achieving balance in the engine for exceptionally smooth running, while providing individual, electronically controlled throttle bodies for each cylinder gives excellent throttle response.

The V10 produces 480Nm of torque at 6,800rpm, 90 per cent of which is available from 3,700rpm all the way to the 9,000rpm red line, thanks to Dual VVT-i technology, equal length exhaust manifolds and high-volume, 12-hole fuel injectors. This gives searing in-hear acceleration at all engine speeds and in any gear: 0 to 100km/h takes just 3.7 seconds and maximum speed is over 300km/h.

With a kerb weight of 1,480kg, the LFA has a power to weight ratio of 373bhp per tonne, while specific output of 115bhp per litre is among the highest of any current supercar.

The engine was developed in conoctction with Yamaha through the established collaborative partnership between Toyota Motor Corporation and the Japanese specialist engineering company.

The formidable performance of the V10 is managed through an equally advanced transmission, a purpose-designed six-speed Automated Sequential Gearbox (ASG) that drives the rear wheels via a limited slip differential. To help achieve the optimum 48:52 front-to-rear weight distribution, it is contained in a transaxle mounted over the rear axle.

The system has four driving modes: Auto, Sport, Normal and Wet, activated by a selector dial on the dashboard. Each mode has a specific gearshift programme, and engine and brake control logic systems to let the driver tailor the car’s performance to suit driving conditions.

The LFA’s acoustics, induction system and exhaust notes have been specially tuned to deliver an awesome “soundtrack” that expresses the car’s extreme performance, both outside and inside the cabin. Referred to by the acoustic team as “Octave Harmony”, it is inspired by the sound of a Formula 1 engine at full revs and is unlike that of any other road car, with different harmonic qualities created as the engine moves up towards its maximum 9,000rpm.

The LFA programme was launched in 2000 as a straightforward R&D project, but gained impetus with the appointment of Haruhiko Tanahashi to lead a dedicated team of engineers, committed to a bespoke Lexus development programme. The first LFA prototype was completed in 2003 and a design study made its public debut at the 2005 Detroit motor show. In 2008 and 2009 the LFA was entered in the Nurburgring 24-hour race, the intention being to push the car hard under testing conditions prior to its official launch as a production-ready model at the 2009 Tokyo motor show.

The LFA will be hand-assembled at the Motomachi plant in Toyota City. Only 500 examples will be built, at a maximum rate of 20 per month to ensure the finest build quality and attention to detail. Each V10 engine will be assembled by a single engineer, and will bear his signature as testament to each LFA’s bespoke status.

[IMG]http://www.oneshift.com/showroom/uploadimages/resized-20091021194519361.jpg[/IMG]

[IMG]http://www.oneshift.com/showroom/uploadimages/resized-20091021194708045.jpg[/IMG]

[IMG]http://www.oneshift.com/showroom/uploadimages/resized-20091021194610585.jpg[/IMG]

[IMG]http://www.oneshift.com/showroom/uploadimages/resized-20091021194640572.jpg[/IMG]

Credits: