Carburetors with vacuum lines are still found on classic vehicles and small-displacement engines — but what is the vacuum ...

Horse Powertrain and Repsol have co-developed a hybrid concept engine that boasts higher mileage and lower carbon emissions.

Despite its critics and moves toward electrification, the internal combustion engine is not yet dead. Though its design for ...

A new hybrid architecture from Horse Powertrain aims to bridge combustion and electrification by operating entirely on renewable gasoline.

Formula 1 has used a hybrid power unit architecture since 2014. For twelve seasons, teams built their cars around a 1.6-liter ...