We've already seen the majestic looks of the Aston Martin Valkyrie many times over. In fact, Aston Martin even revised its exterior design last month in order to ditch its concept-like looks.
But despite getting to see its transformation from concept to a fully-working production car, we have yet to see (and hear) what is perhaps its most important feature: its naturally-aspirated V12 engine.
Producing 1000 PS, the Cosworth-tuned 6.5-liter V12 is a masterpiece of engineering. Without any turbochargers helping it reach that kind of output figures, both Cosworth and Aston Martin had their work cut out for them. For the two companies, being able to build an engine that produces 1000 PS without the aid of turbochargers is the 'absolute pinnacle for performance, excitement, and emotion'.
Most of the V12's internal components are machined out of solid materials. For starters, the conrods and F1-spec pistons are made from Titanium. This allowed engineers to make each part have greater consistency and durability while also being lightweight.
Then there's the billet-machined crankshaft which started out as a solid piece of metal. It was roughed out, heat-treated, machine-finished, and heat-treated once more before being super-finished. The result is a crankshaft that is 50% lighter than the one used on the Aston Martin One-77, itself having a Cosworth-developed series V12 under the hood.
The result is a twelve-cylinder engine that cranks out 1000 PS at 10,500 rpm along with 740 Nm of torque at 7000 rpm. Not only that, the V12's redline is rated 11,100 rpm while the engine itself only weighs in at a light 206 kg thanks to the use of solid, lightweight materials. The V12 will also get additional help from a hybrid powertrain which they will reveal at a later date.
“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 F1 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,” said Bruce Wood, Cosworth Managing Director.
For Dr. Andy Palmer, president and CEO of Aston Martin Lagonda, the challenged posed by making a naturally-aspirated V12 produce that kind of power was well worth it.
“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,” added Palmer.