The BMW N20/N26 Engine has the following critical specifications:
- Engine Block & Cylinder Head Metal Composition: Diecast Aluminium AlSi9Cu3
- Crankshaft Material: Forged Material
- Connecting Rod Material: Cast Material
- Piston Material: Cast Material
- Bore Spacing: 91 mm
- Bore Size: 84 mm
- Displacement: 1.997 L
- Stroke: 90.091 mm
- Compression Ratio: Either 10.0:1 or 11.0:1
- Connecting Rod Centre to Centre: 144.35 mm
- Crank Throw: 44.8 mm
- Crankshaft Offset: +14 mm
- Wrist Pin Offset: -0.3 mm
- Cylinder Wall Plasma Arc Coating Thickness: 1 mm
- Cylinder Wall Thickness Between Cylinders: 7 mm (3.5mm per cylinder)
- Cylinder Wall Thickness on the Thrust & Non-Thrust Sides: 7 - 10 mm Note: the 10 mm is located at the main contact surface with the pistons thrust/non-thrust surfaces.
- Intake Valve Diameter / Stem-diameter: 32/5 mm
- Exhaust Valve Diameter / Stem-diameter: 28/6 mm
- Maximum Valve-Lift, Intake/Exhaust Valve: 9.9/9.3 mm
- VANOS Adjustment Range, Intake: 70 °CA
- VANOS Adjustment Range, Exhaust: 55 °CA
- Intake Camshaft Spread: 120 - 50 °CA
- Exhaust Camshaft Spread: 115 - 60 °CA
- Opening Period, Intake Camshaft (Duration): 258 °CA
- Opening Period, Exhaust Camshaft (Duration): 252 °CA
- DME Used: MEVD17.2.4, MEVD17.2.9, MEVD17.2.P (Oldest to Newest)
- DME Used in Z4 E89 & X1 E84 N2x: MEVD17.2.4T, MEVD17.2.9T (Oldest to Newest)