to rev higher, and over a V12 for its lower reciprocating mass, allowing for more rapid engine response. Lexus claimed their engine could rev from idle to its redline in 0.6 seconds and an analog tachometer needle could not accurately track the LFA's changes in engine speeds. This necessitated the use of a digital tachometer which can instantly display engine speed. The engine reportedly weighs less than the manufacturer's own 3.5-litre 2GR-FE V6 engine. Engineers attempted to make the engine sound like that of a Formula One car with high revs, while at the same time maintaining reliability and vibration control. Along with other manufacturers such as Ferrari, Toyota had produced its own F1 engines and chassis designs. The exhaust note has been described by Toyota engineers as the "roar of an angel", and a US television spot later used the engine sound to shatter a champagne glass via resonance frequency. The powerplant gives the LFA a weight-to-power ratio of 2.67 kg/hp and enables it to reach a top speed of around . Unlike the IS F's 2UR-GSE engine, Yamaha co-developed the entire engine, and not just the cylinder heads. The engine exceeds Euro V emissions. The engine is installed with a front mid-engine placement. According to Chief Engineer Haruhiko Tanahashi a front engine layout was selected instead of a mid engine layout as it is inherently more forgiving dynamically, affording less experienced drivers a wider safety net. Transmission The gearbox built by Aisin is a six-speed single-clutch automated manual transmission actuated with paddle-shifters. Lexus initially sought to use a dual-clutch transmission, but decided that the shift feel was too smooth. Instead, they opted for an automated sequential gearbox, a system previously developed for the Toyota MR2 by Norwegian technology company Kongsberg Devotek (now Semcon). While much of the software and control system was kept, Devotek adapted the mechanics and hydraulics of to match the increased performance demands of the LFA. Chassis The Lexus LFA's frame is made from an in-house designed and manufactured carbon fibre-reinforced polymer (CFRP) centre monocoque with aluminium front and rear subframes. The subframes, which can be removed and replaced minimising potential repair costs, are joined to the monocoque using a newly developed aluminum flanged collar designed to create a stronger joint. According to the manufacturer, the quality of the CFRP material matches that of aeronautical grades and is woven by a laser monitored circular loom,