The Dodge T-Rex is a Ram-based concept vehicle produced by Dodge in 1997 with three axles and six-wheel drive.It was powered by the 8.0-liter Magnum V10 engine, borrowed from the production 1990s era Ram 2500 V-10. The engine was rated for 300 horsepower and 450 pound feet of torque in the Ram. Mercedes-Benz, which owned Chrysler at the time, made a 6X6 version of the G63 AMG SUV/truck.