GS400
| Body Type: 4-door 5-passenger luxury performance sedan |
| Construction: Unitized body with modular suspension subframes |
| Overall Length mm (in.) 4805 (189.2) |
| Width mm (in.) 1800 (70.9) |
| Wheelbase mm (in.) 2800 (110.2) |
| Headroom mm (in.) front/rear w/moonroof 956/924 (37.6/36.4) w/o moonroof 990/950 (39.0/37.4) |
| Legroom mm (in.) front/rear 1131/871 (44.5/34.3 |
| Trunk Space cu. m. (cu. ft.) 0.419 (14.8) |
| Fuel tank Capacity L (imp. gal.) 75.0(16.5) |
| Acceleration, 0-60 mph 6.0 seconds |
| Top Track Speed 239 kph |
| Fuel Consumption City 13.7 L/100km Highway 9.3 L/100 km |
| Turning Circle m (ft) 11.3 (37.1) |
| Coefficient of Drag (cd.) 0.30 |