Mazdaspeed never built many production cars, but they could've had more if all these had gone into production.

Electrification may be coming down the line eventually, but these cars with high-revving engines show that internal combustion isn't going anywhere yet.

LiquidPiston’s flagship innovation, the X-Engine, builds on the principles of rotary engines but with a transformative twist.

WinGD has already secured nearly 30 orders for X-DF-A engines in the bulk carrier, containership, tanker and LPG/ammonia ...

Now Pratt & Whitney thinks it may have taken the first steps along that path with the Hydrogen Steam-Injected, Intercooled ...

For a fuller exploration of the CR-X 2, you can check out the original project feature by legendary editor emeritus Don Sherman or read Elana Scherr's recent drive of the car when it was restored and ...