The 280ZX was a complete redesign, retaining only the L28 inline-six engine and other driveline components from the 280Z. Both two-seat and four-seat (2+2) designs were offered. Compared to the more overtly sporting earlier models, the 280ZX was a much softer, heavier car, with less focus on driving and more on driver comfort and refinement.[1] Softer suspension, better sound insulation, more comfortable seats, and ample equipment including high-end audio systems defined the new ZX. In the spirit of the times, emissions controls and aerodynamics were markedly improved over the first generation Z-cars, while weight was down somewhat as long as the buyer did not pick much from the very long options list.[2] The exterior design was evolutionary, less rounded and with better integrated safety bumpers. Many parts, including the rear-axle and the power steering came from the Datsun 810 luxury sedan.[2] Most of the design effort went into the entirely different and much more modern interior.[3] The car became a grand tourer rather than a sports car, particularly in the plush Grand Luxury versions.