In 1965, Lamborghini offered as an option, the larger 4-litre engine in the 350 GT that turned it into the 400 GT.
The engineers at Lamborghini increased the stroke from 77 to 82 for a total displacement of 3929cc. This brought over power from 270 to 320 bhp at 6500 rpm.
Only 23 versions of the 400 GT were made. They were a interim stop gap between the 350 GT and 400 GT 2+2. As such features like the twin headlights and front bumper overriders were first fitted to this model.
| type | Limited Production Car |
| production years | 1965 – 1966 |
| built at | Sant’Agata Bolognese, Italy |
| coachbuilder | Touring Superleggra |
| production | 23 |
| price $ | $ 14,250 |
| predeccesor | 1964 Lamborghini 350 GT |
| succeccesor | 1966 Lamborghini 400 GT 2+2 |
| engine | 60° V12 |
| position | Front, Longitudinal |
| aspiration | Natural |
| block material | Aluminum Alloy |
| valvetrain | DOHC 2 Valves / Cyl |
| fuel feed | 6 Twin-Throat 40 DCOE Weber Carburetors |
| displacement | 3929 cc / 239.76 in³ |
| bore | 82 mm / 3.23 in |
| stroke | 62 mm / 2.44 in |
| compression | 10.5:1 |
| power | 238.6 kw / 320 bhp @ 6500 rpm |
| specific output | 81.45 bhp per litre |
| bhp/weight | 220.54 bhp per tonne |
| torque | 374.2 nm / 276 ft lbs @ 4500 rpm |
| body / frame | Steel Body over Steel Rectangular Frame |
| driven wheels | RWD |
| wheel type | Borrani Wire |
| front tires | 210-15 VR Pirelli Cinturato |
| rear tires | 210-15 VR Pirelli Cinturato |
| front brakes | Girling Discs w/Vacuum Assist |
| rear brakes | Girling Discs w/Vacuum Assist |
| front wheels | F 38.1 x 16.5 cm / 15.0 x 6.5 in |
| rear wheels | R 38.1 x 16.5 cm / 15.0 x 6.5 in |
| steering | Worm & Roller |
| f suspension | Double Wishbones w/Coil Springs, Telescopic Shock Absorbers |
| r suspension | Double Wishbones w/Coil Springs, Telescopic Shock Absorbers |
| curb weight | 1451 kg / 3199 lbs |
| wheelbase | 2550 mm / 100.4 in |
| front track | 1384 mm / 54.5 in |
| rear track | 1384 mm / 54.5 in |
| length | 4500 mm / 177.2 in |
| width | 1730 mm / 68.0 in |
| height | 1220 mm / 48.0 in |
| transmission | Lamborghini 5-Speed Manual |
| tran clutch | Single Dry Plate |
| gear ratios | 2.520:1, 1.740:1, 1.230:1, 1.000:1, 0.815:1 |
| final drive | 4.08:1 |
| top speed | ~249.40 kph / 155 mph |
| 0 – 60 mph | ~7.4 seconds |
| 0 – 100 mph | ~17.8 seconds |
| 0 – 1/4 mile | ~15.5 seconds |
| fuel econ epa | 18 L/100 km or 13 mpg-us |
| fuel capacity | 80 litres |
