Sylvain Tremblay compares the 1991 Mazda 787B and the current Mazda SKYACTIV Diesel Prototype. ABOVE: The RX-7 GTO and the 787B at the 2013 Monterey Motorsports Reunion. The current SKYACTIV Diesel Prototype.There’s no doubt that racing technology, like every facet of technology, has advanced rapidly in the last two decades....

Mazda will once again be streaming live video from the Continental Tire Road Race Showcase at Road America. The YouTube stream will include in-car cameras mounted in different angles inside and on the Mazda SKYACTIV Diesel Prototypes competing in the TUDOR United SportsCar Championship race at Road America. The green...