[Video] Watch one-off Porsche 961 on a rare outing at Zandvoort | GRR

Like many race cars, the Porsche 961 lived and died by regulations. Based on the all-singing-all-dancing 959 hypercar – with four-wheel-drive, sequential turbocharging and active suspension – Stuttgart built the 961 to sew up Group B racing in the same way the 956 dominated Group C.