| General data | |
| Year/s of production | 1959 – 1964 |
| VIN span | 1623 GT – 5805 GT |
| Number produced | 4 ? |
| Design | Giorgio Neri & Luciano Bonacini |
| Manufactured by | Giorgio Neri & Luciano Bonacini |
| Technical specifications | |
| Chassis | 508 F S/N 3771 GT: 539/61 |
| Length | Approx. 4700 mm |
| Width | Approx. 1690 mm |
| Height | Approx. 1330 mm |
| Wheelbase | 2600 mm |
| Front suspension | Independent wheel suspension, double delta wishbones, coil springs, hydraulic telescope shock absorbers |
| Rear suspension | Rigid axle, longitudinal leaf springs, double trailing links, coil springs, hydraulic telescope shock absorbers |
| Front track | 1354 mm |
| Rear track | 1350 mm |
| Front tyres | 6 x 16 in., Borrani wheels with wired spokes and central locking |
| Rear tyres | 6 x 16 in., Borrani wheels with wired spokes and central locking |
| Front brakes | Hydraulically operated disc brakes |
| Rear brakes | Hydraulically operated disc brakes |
| Kerb weight | Approx. 1200 kg |
| Body material | Steel or aluminium |
| Body type | Spyder or Coupé – in each case with two seats |
| Engine | |
| Type | 128F – Colombo front engine S/N 3771 GT: 168/61 – Colombo front engine |
| Number of cylinders | V12 – 60° |
| Displacement | 2953 ccm |
| Bore and stroke | 73 x 58,8 mm |
| Camshaft | 1 overhead per cylinder bank |
| Valves | 2 per cylinder |
| Compression ratio | 8,8:1 S/N 3771 GT: 9,8:1 |
| Ignition | Single ignition |
| Lubrication | Wet sump lubrication S/N 3771 GT: Dry sump lubrication |
| Maximum power | Approx. 240 hp – 7.000 rpm S/N 3771 GT: Approx. 280 hp – 7.500 rpm |
| Maximum torque | Approx. 265 Nm (27 mkg) – 5.000 rpm |
| Carburettor | 3 Weber twin carburettors, type 36 DCF S/N 3771 GT: 6 Weber twin carburettors, type 38 DCN |
| Gearbox | 4 gears plus overdrive + rev. S/N 3771 GT: 5 gears + rev. |
| Performance | |
| Top speed | Approx. 240 km/h |
| VINs | |
| Nembo Coupé S/N 1623 GT: S/N from 250 GT Coupé, converted 1964 |
|
| Nembo Spyder S/N 1777 GT: S/N from 250 GT Cabriolet Series 2 |
|
| Nembo Spyder S/N 3771 GT: S/N from 250 GT SWB |
|
| Nembo Spyder S/N 5805 GT: S/N from 330 GT 2+2 Series 1, right hand drive |