When the E46 3 Series first arrived, its four-cylinder petrol engines relied on the aging M43—a simple, eight-valve design that left the 316i and 318i feeling underpowered compared to the six-cylinder ...

Before turbocharging took over, before variable valve timing became standard, and before BMW’s M division had anything close to a volume playbook, there was the S38. A naturally aspirated inline-six ...