I've had a few people ask me about the finer details of the 1.8 16v XU engine lately, so here are some answers:   Block height from crank centre line 224.5mm Stroke 81.4mm Bore 83.0mm Rod length centre to centre 150.5mm Big end journal diameter 45mm Small end diameter 22mm (Interference fit) Piston crown height from pin centre 33.3mm Pistons rise flush with deck at TDC Piston crown total volume (dish and cutouts) ~ 2.0cc Gasket volume (1.4mm x 84mm dia) ~ 7.8cc Chamber volume standard ~ 37.2cc Chamber volume with 0.25mm skim (maximum practical) ~ 36.0cc Standard CR 10.4:1 Skimmed CR 10.6:1 Inlet valve cutout 2.5mm max lift at TDC (allowing 1.5mm clearance) Exhaust valve cutout 2.0mm max lift at TDC (allowing 1.5mm clearance) Inlet valve diameter 34.6mm Exhaust valve diameter 29.6mm   Omega Mi16 piston next to XU7J4 OE piston, earlier today...