sentences:  Advanced Engine Research had an agreement with Nissan to modify their production VQ 3.0 Litre V6 for use in the SR2 class.However, as a customer car, the AER-Nissan unit was not put into all cars, and other engines have been used over the chassis' lifetime.Such choices included a Mazda turbocharged 2-rotor, a Judd V8, a Porsche Flat-6, and a Ford turbocharged Inline-4 developed by Millington.