The Iconic SP remains a passion project at heart, though budget cuts and business challenges could slow its path from concept ...

Bruno started at Top Speed in 2022 and now serves as Senior Editor for ICE while also training writers across CarBuzz, HotCars, and TopSpeed. A car and motorcycle enthusiast, he enjoys writing about ...

A German engineer, Felix Wankel, is credited with developing the world's first rotary engine in the 1950s. Wankel rotary engines use a triangular rotor spinning in a semi-oval case on an eccentric ...

The Mazda SP, unveiled as a concept at the 2023 Tokyo show, might not make it to a production version after all.

Apex seals typically fail due to a lack of lubrication. If given adequate oil, apex seals can last for a relatively long time ...

Fewer than 38,000 of NSU’s revolutionary Ro80 models were built in the 10 years between its debut late in 1967 and the day in 1977 that NSU’s corporate parent, Volkswagen-Audi, turned the factory that ...

In theory, Wankel-style rotary internal combustion engines have many advantages: they ditch the cumbersome crankcase and piston design, replacing it with a simple, single-chamber design and a ...

Like adding microtextures to plastics, the rotary valve idea in the RevForce design could potentially be an industry game-changer. Traditional Two-Stroke Engine Issues A traditional two-stroke engine ...