The sweet sounds of GMA T.50 V12 Cosworth engine


In a series of T.50 VLOG’s on official Gordon Murray Automotive YouTube channel their host three time Indy 500 winner Dario Franchitti, is showing insights of the creation of GMA supercar T.50. In the latest video he visited engine builder Cosworth to show us their V12 masterpiece revving on the dyno. 


On the mission to produce the most driver focused sportscar, Gordon Murray vision for the engine is light, responsive, highest revving V12 naturally aspirated engine with the cleanest possible design.

The task was delegated to Cosworth and the fable marque idea was 3.5 litre naturally aspirated, highest revving road car engine that will also produce highest power density of any naturally aspirated engine, 166 PS per litre.

Superlative performance are backed with meticulous engineering and attention on weight savings that resulted with engine weight of just 178 kg.



No. cylinders: 12
Capacity: 3,994cc
V-angle: 65°
Power: 652 bhp
Aspiration: Naturally aspirated
Bore: 81.5 mm
Stroke: 63.8 mm
Compression ratio: 14:1
Max power: 663 PS @ 11,500 rpm
Power to weight ratio: 672 PS per tonne
Weight to power ratio: 150 kg per 100 PS
Max torque: 467 Nm @ 9,000 rpm
Flexibility: 71% of max torque @ 2,500 rpm
Maximum rpm: 12,100 rpm
Valve train: Gear driven double overhead camshafts
Inclined axis 4 valves per cylinder – variable valve timing on inlet / exhaust
Induction system: RAM induction airbox – 4 throttle bodies – Direct Path Induction Sound
Exhaust system: Inconel and Titanium
Lubrication system: Dry sump
Cooling system: Water-cooled – twin aluminium front radiators
Oil cooling system: Single aluminium rear radiator
Ignition system: 12 individual coils 12-volt
Starter/alternator: 48-volt gear driven integrated starter / generator
Exhaust emission control: 4 catalytic convertors with Lambda sensors and secondary air injection
Engine block: Aluminium alloy
Cylinder heads: Aluminium alloy
Connection rods: Titanium
Valves: Titanium
Total engine weight: 178 kg
Engine mounting: Semi-structural-inclined axis shear mounting (IASM)
Power density: 166 PS-per-litre

Here is the video where you can hear it the sound of the T.50 engine, reminiscent of the Formula 1 engine sounds of the 90’s.