The K-Series engine

Engine

An engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines burn a fuel to create heat which is then used to create motion...

 is a series of engines built by Powertrain Ltd

Powertrain Ltd

Powertrain Ltd was a British company based in Birmingham which designed, manufactured and marketed car engines and transmissions. It was a subsidiary of Phoenix Venture Holdings and a sister company to MG Rover...

, a sister company of MG Rover. The engine was built in two forms: a straight-four cylinder, available with SOHC and DOHC, ranging from 1.1 L to 1.8 L; and the KV6

Rover KV6 Engine

The KV6 automotive engine is a 24 valve, quad cam V6 engine, available in 2.5 litre or 2.0 litre, built by Powertrain Ltd which is a sister company to MG Rover...

 V6 variation.
The K-Series was introduced in 1988 by Rover Group

Rover Group

The Rover Group plc was the name given in 1986 to the British state-owned vehicle manufacturer previously known as British Leyland or BL. Owned by British Aerospace from 1988 to 1994, when it was sold to BMW, the Group was broken up in 2000 with the Rover and MG marques being acquired by the MG...

 as a powerplant for the Rover 200 car. It was revolutionary in that it was the first volume production implementation of the low pressure sand casting technique.