The BMW N63 engine was launched in a mid-sized luxury what?
BMW N63 The BMW N63 is a twin-turbo DOHC V8 engine which has been in production since 2008 to present. It is the world's first production car engine to use a "hot-vee" layout, with the turbochargers located inside the "V" of the engine. It is also BMW's first V8 engine to use direct injection. The N63 was launched in the 2008 BMW X6 xDrive50i.
BMW M21 The BMW M21 is a six-cylinder-inline-diesel engine developed by the bavarian engine manufacturer BMW. It uses (indirect) fuel injection and is based on the M20 petrol engine and was produced for BMW by the upper Austrian Steyr engine plant from 1983 to 1991. It was succeeded by the M51.