Bore and stroke do far more than define engine size. They help shape airflow, piston speed, torque delivery, and rev ...

Engine power is a product of its overall displacement, but two similarly-sized engines with different bore and stroke ...

Geely now holds a Guinness World Record for thermal efficiency, with its new i-HEV system rated at 48.4%, according to a ...

Renault-Geely's powertrain could be perfect for car manufacturers switching from just EVs to hybrids ...

Stellantis is recalling thousands of replacement engines over possible sand contamination ...

Intake, compression, power, then exhaust. Every 4-stroke engine ever made – about 80% of all engines currently in existence – function on this principle – even rotary engines. But now, Porsche has ...

Your old, reliable engine has been coughing up some strange, but concerning noises. So, you call your mechanic to find out what the problem and solution are to restoring its harmonious hum. But the ...

For 42 years, the XK was Jaguar’s secret weapon. It proved its worth on the racetrack and powered generations of cars. The ...

Godzilla is the Ford swap engine of choice right now. Here are 20 upgrade options that make the 7.3-liter beasts even better. Engine-swapping is taking a powerplant and installing it into a vehicle ...

The rotary was the most radical rethink of the combustion engine in over a hundred years — and it paid the price for being different. Mazda introduced the innovative Wankel rotary engine in the 1967 ...

Rim-driven thrusters turn the normal propeller-motor arrangement inside out; rather than mounting the motor at the center of ...