There are two versions of the BMW N62B44 engine. Both versions have the same displacement, power, bore, and stroke: 4.4 liters (4398 cc), 92 mm bore, and 82.7 mm stroke. One version’s developed power is 320 horsepower at 6100 rpm and 440 Nm of torque at 3700 rpm. The second version produces 450 Nm of torque at 3600 rpm and 333 horsepower at 6100 rpm.
Other modifications of N62: N62B36, N62B40, N62B48.
Specifications
| Production years | 2001-2006 |
| Displacement, cc | 4398 |
| Fuel system | injector |
| Power output, hp | 320 /6100 rpm 333 /6100 rpm |
| Torque output, Nm | 440 /3600 rpm 450 /3500 rpm |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 92 |
| Piston stroke, mm | 82.7 |
| Compression ratio | 10 10.5 |
| Features | Valvetronic |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | double VANOS |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 8.0 |
| Fuel type | petrol |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for BMW 745i E65) — city — highway — combined |
7.1 5.3 5.8 |
| Engine lifespan, km | ~320 000 |
| Weight, kg | 213 |
Disadvantages of the N62B44 engine
The Valvetronic and VANOS system malfunctions are the primary cause of the motor’s issues; the increasing oil consumption brought on by valve stem seal wear comes in second.
Flowmeters or ignition coils are typically the cause of floating RPM;
Crumbs from a collapsing catalyst are sucked into the cylinders over time; the crankshaft oil seal and the generator housing sealing gasket are frequently leaking.