E60 530i
The BMW E60 530i features N52 naturally-aspirated 3.0-liter inline six-cylinder producing 258 horsepower (190 kW) at 6,600 rpm with 300 Nm torque at 2,500 rpm in 2005 models, upgraded to 272 horsepower (200 kW) at 6,700 rpm with 320 Nm torque from 2,750-3,000 rpm for 2006-2007 model years through six-speed automatic or manual transmission and rear-wheel-drive, achieving 0-62 mph in 6.7 seconds and electronically limited 155 mph top speed.
N52 represents BMW first water-cooled engine featuring composite magnesium-aluminum alloy cylinder block reducing weight while maintaining durability, earning Wards AutoWorld top 10 engine recognition for 2006-2007 model years. The E60 530i provides balanced combination of performance and fuel economy in mid-specification 5-Series positioning between four-cylinder 523i and V8-powered 545i/550i variants, with naturally-aspirated inline-six configuration maintaining traditional BMW engine characteristics before transition to turbocharged four-cylinder and six-cylinder powertrains in subsequent F10 generation.