The Porsche 928 S4 variant debuted in the second half of 1986 as a 1987 model, with an updated version of the 5.0 L V8 for all markets producing 235 kW; 316 hp (320 PS), sporting a new single-disc clutch in manual transmission cars, larger torque converter in cars equipped with automatic transmission cars and fairly significant styling updates which gave the car a cleaner, sleeker look. The S4 was much closer to being a truly world car than previous models as the only major differences for North American models were the instrumentation in either kilometers or miles, lighting, front and rear bumper shocks and the availability of catalytic converters in some other markets. In 1992 (1993 in North America), the S4 would pave the way for the final iteration of the series, the 928 GTS.