without the limiter and depending on what region the Nissan is from, if you take off the speed limiter on a european spec, it will reach a top speed of 157 MPH and reach 0-60 in 6.2 seconds. North American ones where choked by catalyst and, therefore are slightly slower. the best reported time for a American spec was 6.9 seconds 0-60 and a top speed of about 153 MPH. Also in 1988 (could be 1989) Motor Trend tested a 88 Nissan 300zx turbo Z31. they put the car against a Ferrari Testarossa, a Corvette a Porsche 928, and etc. each lap the cars where posting faster laps each time. The Nissan 300zx turbo the tested managed to reach a top speed of 153 MPH, which put it in fourth place just behind the Corvette, the 928 and unsurprisingly, the Testarossa, which settled in first place.