 Even today the MP4/3 is still considered to be one of the most powerful F1 cars ever made, since turbo boost pressure would be further reduced to 2.5 bar in , reducing the power output of the turbo engines to around in a bid to make the naturally aspirated cars more competitive.Turbocharged engines were then banned completely in , so the turbo era in Formula One may remain possibly the high-water mark for horsepower levels in Formula 1.The MP4/3 was also the car with which Prost won the 1987 Portuguese Grand Prix to become the driver with the most wins in Formula One history beating Jackie Stewart's record of 27 wins which had stood since Stewart retired at the end of .