BMW M21 Engine

A fleet of Ford Thunderbirds descended on Munich in the 1970s so BMW Motorsport could test fit diesel engines

By Steven Paul • January 3, 2026

Back in the 1970's, to compete with the European diesel-powered cars, Ford borrowed a six-cylinder diesel engine from BMW.

By Nico DeMattia • Updated: March 29, 2020 • Published: March 18, 2017