Nanni is an international leader on the market of marine diesel engines with a product range between 10 and 2000 hp, and for power generator sets from 6 kW up to 750 kW. Moreover, Nanni is one of the top three brands for marine inboard diesel engines in the world.
| Power at crankshaft | 257 kW (349hp) |
| Displacement | 4.5 |
| Configuration | 8 cylinders V design 90° 4 valves per cylinder |
| Operation type | 4 strokes Diesel |
| Bore & Stroke | 86 x 96 mm |
| Compression ratio | 15:8 : 1 |
| Rated speed | 3800 rpm |
| Idling speed | 550 rpm |
| Peak torque | 762 Nm |
| Peak torque speed | 2600 rpm |
| Engine base | Toyota |
| Fuel system | Direct injection High pressure Common Rail Electronically controlled |
| Air intake | Twin turbocharger |
| Cooling | Closed cooling with heat exchanger |
| Max mounting angle | 7° Front down 7° Front up |
| Alternator | 12 Volt 120 Amp |
| Rating | M6 |
| Emission compliance | EPA marine Tier 3 RCD2 2013/53/EU |
| Dry weight with TM345A | 435 kg |