The 280ZX's body was redesigned with aerodynamics in mind. By closing in the open grille of the first generation Z-car and through other improvements taken from wind-tunnel testing, the drag coefficient was reduced from 0.467 to 0.385, and the lift coefficient from 0.41 to 0.14. The new design had a lower center-of-gravity and nearly 50/50 weight distribution in both the two-seater and 2+2 designs. The rear of the car was stretched to accommodate a larger 80 L (21.133 US liquid gallons) fuel tank. Overall, the new body design gave better fuel economy and high-speed stability (one of the known issues from the first generation Z-car).