It shares a platform with a BMW

Toyota chose to build the most recent Supra on the same chassis as the most recent BMW Z4.  

The decision for Toyota to collaborate on this project makes sense when you consider the money saved and the design time.

The inline six-cylinder engine of the Toyota Supra is one of its most recognisable features.

There are a lot of V6 alternatives in the Toyota lineup, but no straight-six engines are under development.

BMW is still working on its inline six-cylinder engines. Toyota has full confidence in employing a BMW engine in its storied sports vehicle because of their history dating back to the 1930s.    

The BMW-built B58 engine is also a fantastic tuning base. With the excitement around the new Toyota Supra,

modifications started to be made swiftly, and motorsport development exploded.