German Hans-Albert Zender began supplying after-market kits for cars in the 1960’s.  In 1985 he built his first car which was powered by an Audi engine.  The Fact 4 Biturbo was introduced in 1989 and was intended for a short production run, but it remained a prototype.  In 2008, the company closed its tuning business.

1989 Zender Fact 4 Biturbo.  Model by Alezan