Piston Compatible with BMW 328i, 428i, X3, and X4 (2.0T) N20B20A Engines
Piston kits specifically designed for the BMW N20B20 engine are typically manufactured from ZL109 alloy and engineered for turbocharged applications. Common specifications include a bore size of 84 mm (standard) or 84.5 mm (+0.5 mm), a compression ratio of 10:1, and a piston pin diameter of 22 mm; such kits typically include piston rings, piston pins, and circlips.
Description
Piston Specifications (N20B20):
Bore Diameter: 84mm (Standard Size) or 84.5mm (+0.5mm Oversize).
Compression Ratio (CR): 10:1 (Most Common); optional specifications ranging from 9.2:1 to 10.2:1 are also available.
Material: ZL109 Aluminum Alloy.
Piston Pin Diameter: 22mm.
Piston Type: Dish-top, or featuring a specialized crown design engineered for optimal combustion efficiency in turbocharged applications.
Weight: Approximately 342g per piston (actual weight may vary depending on the manufacturer).
Piston Ring Thickness: Typically 1.2mm / 1.5mm / 2.0mm.
OE Number: 11257640166
















