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All the key facts and figures on Lamborghini's new V12 engine and automated manual gearbox

Lamborghini has revealed full details of its all-new V12 engine, set to make its debut in next year's Murciélago replacement. Here, Autocar takes an in depth look at the new 6.5-litre unit, as well as the firm's new single-clutch automated manual gearbox.

The engineLamborghini’s R&D team was given just two criteria for the new motor, codenamed L539 and designed from a blank sheet of paper: it had to be a V12 and have a 60-degree bank.

In the end the team ended up with the old motor’s 6.5-litre capacity, but 59bhp more, at 691bhp. There’s more torque, too - a peak of 509lb ft - and it’s available 500rpm further down the rev range, at 5500rpm.

The bore increases, from 88mm to 95mm, but the stroke is down from 89mm to 76.4mm; the compression ratio is 11.8:1, compared with the old unit’s 11:1. There’s also a useful reduction in weight, from 253kg to 235kg, and the dry sump height is just 120mm, 75mm lower than the old motor’s. “This makes a big difference in the centre of gravity,” chief engineer Maurizio Reggiani says.

See pics of Lamborghini's new engine and gearbox tech

Features to improve the motor’s efficiency include switchable water circuits to hasten warm-up, and a total of eight scavenging pumps that reduce pressure and scavenging losses by around 50 per cent.

There’s no direct injection, though - for now, at least. “We looked at it,” Reggiani revealed, “but there are issues with back pressure [in the exhaust system] and how you manage that while still achieving maximum power. Multi-point injection is a simple solution that avoids an additional device to reduce particulates, so we’ve gone with that. But DI is something we could look at again in the future.”

The gearboxHaving ruled out a dual-clutch unit, Lambo has gone with another single-clutch automated manual for the next Murciélago. “It’s the most emotional system to use,” said CEO Stephan Winkelmann, who has called the new unit - developed in conjunction with Graziano - “a sequential race gearbox in a roadgoing car”.

The new gearbox (called ISR, for Independent Shifting Rods) is a seven-speed, 70kg unit with a twin-plate, 235mm clutch. It uses four shifting rods to run the shift process “virtually in parallel”; times fall to as little as 50ms, around 40 per cent faster than with the Gallardo’s e-gear system.

Read more on Lamborghini's lightweight future

The gearbox will run in three modes: Strada, which will offer a fully automatic shift if desired, the more focused Sport and the extreme Corsa, which will also include launch control.

The differential set-up includes a computer-controlled unit at the front, instead of the old viscous coupling, a Haldex4-based centre diff and a rear unit that’s integrated into the casting of the engine.

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Lamborghini claims the new gearbox is tidier and smaller than the old transmission, a factor that should free up cabin space in the Murciélago’s replacement. The firm also says almost all customers want this set-up - and as a result, the car will not be available with a regular manual.

See all the latest Lamborghini Murciélago reviews, news and video

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lilianna 4 April 2014

Still a mangled ape!!!

Still a mangled ape!!!
jelly7961 21 November 2010

Re: Lambo's new V12 in detail

jmd67 wrote:
Call me hard to please but I was looking for bigger advances over the old engine, especially considering that the existing unit is ancient

Me too. And the old engine is around 50 years old so you would have to say that it has done some pretty sterling service over the years. What I find interesting is that surely as the VAG groups pinnacle - Bugatti aside surely it should have literally everything that is technically possible/available? We have seen the incredible advances made by both Merc and BMW in getting performance WITH astounding economy - shouldn't the new Lambo be even better? I remain to be overwhelmed
Lesia44 21 November 2010

Re: Lambo's new V12 in detail

I think there should be a sticky at the top of any thread that mentions paddle shift on cars that most of the posters here have never driven, and will probably never drive which says: Don't knock it till you've tried it! I too roundly dismissed paddles - Ha! Not a real driver's car. Cars for people who don't know how to drive properly. Cars for people who can't heel and toe... blah, blah, blah. But I tell you what, having now driven a fair few Lamborghinis and Ferraris with paddles I'd never go back to a stick. Paddles are just way more fun.