The new engine used in the A70 Supra, the Toyota 7M-GE, was the flagship engine of Toyota's arsenal. Both versions of the engine contained 4 valves per cylinder and dual overhead cams. The turbocharged 7M-GTE engine was Toyota's first distributor-less engine offered in the US which used coil packs sitting on the cam covers and a cam position sensor driven by the exhaust camshaft. It was equipped with a CT26 turbocharger and was rated at at 5,600 rpm while the naturally aspirated 7M-GE engine was rated at at 6,000 rpm. Further refinement on the turbo model increased power to at 5,600 rpm and of torque at 3,200 rpm in 1989. This was mostly due to a redesign of the wastegate. All models used the same tyre size of 225/50R16 on 16x7 inch wheels. Spare tyres were full-sized but on steel wheels.