Stronger valve springs. Bore of Stroke of . Underdriven crank shaft drive pulley. Two-piece oil scraper ring instead of three-pieces. 93 mm pistons with reduced height due to the increased stroke. Applications: 1999–2001 Alpina B10 V8 2000–2004 Morgan Aero 8 GTN 2002–2004 BMW X5 (E53) X5 4.6is Alpina F3 The Alpina F3 was developed by Alpina and based on the M62B44 engine. Released late in 1996 it used a modified M62B44 block supplied to Alpina from BMW featuring a bore of 93mm. It also featured a modified cylinder head, different intake camshafts, a crankshaft with increased stroke along with different pistons, a different air intake manifold and exhaust manifolds as well as custom engine programming. It has a bore of and a stroke of . Applications: 1996-1998 Alpina B10 V8 Alpina F4 Following with updates to the regular production M62B44 the F4 was a revised version of the Alpina F3 engine and featured variable valve timing on the intake camshafts, an electronically controlled throttle body and a slight increase in power. The Alpina F4 received a revision into the F4/1 in late 2000 which slightly increased fuel efficiency while decreasing its emissions output although power output remained the same. It has a bore of and a stroke of . Applications: 1998-2000 Alpina B10 V8 2000-2002 Alpina B10 V8/1 Alpina F5 The F5 was Alpina's final iteration of the M62B44 engine, it featured all the same technology as the F4/1 but with an increased displacement due to an increased stroke thanks to a modified crankshaft. The increased stroke necessitated an oil pan with additional clearance as well as revised intake camshafts and exhaust camshafts from the M62B46 production engine. It has a bore of and a stroke of . Applications: 2002-2004 Alpina B10 V8S 2002-2003 Alpina Roadster V8 Racing Dynamics R52 Based on the production M62B44 the Racing Dyamics R52 engine featured a billet crankshaft, special pistons with stock connecting rods and a modified cylinder head which work together to raise the compression ratio to 11.3:1. It also features custom tubular exhaust manifolds, different camshafts and a modified engine computer which lets the engine spin to its 7,200 rpm redline. It has a bore of and a stroke of . Applications: 1999-2001 Racing Dynamics R52 Sport S62 The BMW S62 engine (full model code S62B50) is the high-performance variant of the M62, which is fitted to the E39 M5 and the