Cosworth leaks Aston Martin Valkyrie power figure

A now deleted tweet from engine supplier Cosworth claims its naturally-aspirated V12 will be the most powerful atmo road engine ever, with more grunt than an F1 car

Aston Martin Valkyrie

ENGINE manufacturer Cosworth might be looking for a new social media person this week, after the brand published (and quickly deleted) a post on Twitter seemingly revealing the power output of the Aston Martin Valkyrie’s atmo V12.

The figure leaked by Cosworth is a staggering 831kW, or 1130hp in old money – a scarcely believable amount if you interpret the brand’s wording literally, which suggests all 831 kilowatts are produced by the road-going Valkyrie’s combustion engine alone (as opposed to the track-only Valkyrie AMR Pro).

Aston Martin Valkyrie cosworth tweet

However, Cosworth could be forgetting a key detail or bending the truth somewhat, as Valkyrie is a hybrid, with a battery and electric motor for the front axle supplied by Croatian EV specialist Rimac.

Cosworth could in fact be linking Valkyrie’s total system output to its combustion engine alone, but even if we assume that’s the case, the claim its 6.5-litre V12 is “the world’s most powerful naturally aspirated road engine” looks credible.

Aston Martin Valkyrie reardoors

The most powerful V12 you can buy (turbocharged or not) is the naturally aspirated 6.5-litre unit found under the bonnet of the Ferrari 812 Superfast, which produces 588kW. Even if the Valkyrie’s electrical assistance accounts for a significant 200kW of the Valkyrie’s total power, the V12 on its own has the Ferrari beaten.

If Cosworth is in fact talking about the race-ready Valkyrie AMR Pro, more than 800kW from an atmo engine is still remarkable stuff.

Aston Martin Valkyrie rear

Lewis Hamilton’s F1 championship-winning Mercedes-AMG W08 has at best guess 707kW according to German publication Auto Motor und Sport, and that is from both the 1.6-litre turbocharged V6 and its complex hybrid system.

Aston Martin Valkyrie side

Whichever way it comes out in the wash, should Cosworth’s leaked figure sit in the ballpark of the Valkyrie’s final power outputs, it is undoubtably one of the most extreme vehicles the world has seen.


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