The first generation of the Supra was based largely upon the Toyota Celica liftback, but was longer by 129.5 mm (5.10 in). The doors and rear section were shared with the Celica but the front panels were elongated to accommodate the Inline-6 instead of the Celica’s 4-cylinder engine. Toyota’s original plan for the Supra at this time was to make it a competitor to the very popular Datsun (now Nissan) Z-car.

| First generation (A40/A50) | |
|---|---|
| Toyota Celica Supra (MA47) | |
| Overview | |
| Also called | Toyota Celica XX (Japan)Toyota Celica Supra |
| Production | April 1978 – June 1981[1] |
| Model years | 1979-1981 |
| Assembly | Japan: Tahara, Aichi (Tahara plant)[8] |
| Body and chassis | |
| Related | Toyota Carina (A40)Toyota Celica (A40) |
| Powertrain | |
| Engine | 1988 cc M-EU I62563 cc 4M-E I62759 cc 5M-E I6 |
| Transmission | 5-speed W50 manual4-speed A40D automatic4-speed A43D automatic |
| Dimensions | |
| Wheelbase | 2,630 mm (103.5 in) |
| Length | 4,600–4,615 mm (181.1–181.7 in) |
| Width | 1,650 mm (65.0 in) |
| Height | 1,290–1,310 mm (50.8–51.6 in) |
| Curb weight | 1,150–1,270 kg (2,535–2,800 lb) |