2023 Gordon Murray Automotive T.33: Review, Trims, Specs, Price, New Interior Features, Exterior Design, and Specifications

The 3.9-liter Cosworth naturally aspirated V12 engine has been reconfigured for the Gordon Murray Automotive T.33. To say that this 65-degree V12 loves to rev is an understatement; it makes 607 hp at 10,500 rpm and 333 lb-ft of torque at 9,000 rpm, but will rev all the way to 11,100 rpm. Remarkably, the T.50’s red line is another 1,000 rpm higher than that.

GMA promises incredible engine response and says that 75% of the torque is already delivered at 2,500 rpm. Cosworth and GMA kept the V12 cylinder heads but modified them, but there are new camshafts, variable valve timing, and engine mapping. The new exhaust system also promises an unforgettable exhaust note which is amplified by the ram induction intake system.

Power is directed to the rear wheels exclusively via one of two transmissions. Developed by British transmission experts Xtrac, the standard gearbox is a six-speed manual with a limited-slip differential. As an option, an automatic with a so-called Instantaneous Gearchange System featuring paddle-shift actuation is available. GMA says that this car ‘box delivers seamless shifts with no interruption of torque and the world’s fastest supercar gear change. At around 172 lbs, it’s claimed to be the lightest supercar paddle shift gearbox in the world.