This might just be the last and greatest petrol engine ever made, Aston Martin’s naturally-aspirated V12.
Aston Martin got help from Cosworth to develop it for the upcoming road-legal Valkyrie hypercar, and what they came up with is this 6.5-litre monster v12 which makes 1,000bhp at 10,500rpm, and 546lb ft at 7,000rpm. It redlines at an unbelievable 11,100rpm so turn up your speakers to hear what that sounds like in the video above.
They have used the engine formula one style as a fully-stressed element of the chassis, which you’d think with the strength needed for that to work might make the engine itself heavy, but it weighs just 206kg and that was without the use of any extotic untested alloys, as its been designed for longevity
Bruce Wood, Cosworth’s Managing Director, said the V12 is “way beyond anything previously seen in a road car application”. Meanwhile Aston’s boss Dr. Andy Palmer said “nothing sounds better or encapsulates the emotion and excitement of the internal combustion engine more completely” than a naturally-aspirated V12, and that he doubts the Valkyrie’s engine “will ever be surpassed”.
Aside from the major castings – block, cylinder heads, sump and structural cam covers – the majority of the engine’s internal components are machined from solid material. These include Titanium conrods and F1TM-spec pistons. Not only does this allow the use of material with ideal properties, but the ultra-fine machining process means greater consistency and components optimised for minimum mass and maximum strength. The result is an engine that weighs just 206kg. By way of comparison, Cosworth’s 3.0 litre V10 F1TM engines (the last before weight limits were imposed by the FIA) weighed 97Kg. If scaled-up to 6.5 litres this pure race engine would weigh 210kg.
One of the best examples of the painstaking optimisation involved is the billet machined crankshaft. Starting life as a solid steel bar 170mm diameter and 775mm long, it is first roughed out, then heat treated, finish machined, heat treated again, gear ground, final ground and superfinished. Upon completion 80% of the original bar has been machined away and some six months have passed, but the end product is a crankshaft that’s an astonishing 50 per cent lighter than that used in the Aston Martin One-77’s V12 – itself a Cosworth-developed evolution of Aston Martin’s series production V12 and, for a time, the world’s most powerful naturally aspirated road car engine.
Bruce Wood, Cosworth Managing Director, said of the project: “Being asked to create a naturally aspirated V12 engine fit for what will surely be one of the most iconic cars of all time is an immense source of pride for Cosworth. Decades in F1TM taught us to expect a pretty demanding specification from someone with Adrian Newey’s unsurpassed track record, but when we started talking about specifics of power, weight, emissions compliance and durability combined with ever harder and sometimes conflicting targets, we knew this would be a challenge like no other. It’s been a fantastic partnership between Aston Martin, Red Bull and Cosworth with each party bringing a distinct clarity of vision that has proved essential in delivering an internal combustion engine way beyond anything previously seen in a road car application.”
Dr. Andy Palmer, Aston Martin Lagonda President and Group Chief Executive Officer, said of the Aston Martin Valkyrie’s V12 engine: “To anyone with a drop of petrol in their blood, a high-revving naturally aspirated V12 is the absolute pinnacle. Nothing sounds better or encapsulates the emotion and excitement of the internal combustion engine more completely. Despite the apparently insurmountable challenges it presented, there was never any question that the Aston Martin Valkyrie would make do with anything less. From the outset the team at Cosworth were unflinching in their commitment to achieving benchmarks which pushed the boundaries of the possible. The result is a quite extraordinary engine. One which I doubt will ever be surpassed.”
Evoking the spine-tingling, ultra-high-revving F1TM engines of the 1990s, but benefitting from two decades of progress in design, material and manufacturing expertise, the Aston Martin Valkyrie’s 1000bhp V12 is a masterpiece, from one of the world’s most illustrious engine builders: an internal combustion engine without peer for a hypercar without precedent.