The inline-6 engine isn't the only configuration with perfect balance. Boxer engines, regardless of the cylinder count, are also inherently balanced, and the same is true for V12 engines.

In 1903, Spyker developed the first ever all-wheel drive car with four brakes for all wheels and the first ever inline 6-cylinder engine. Surprisingly, it was an 8.8-liter monstrosity that only ...

The engine is stamped 18N411381 and V0208MO, which, when put together, suggest this is a numbers-matching 1968 Camaro Z/28 fitted with a 302ci V8 engine built on February 8, 1968.

Then there's the straight-six engine, fitted in only 3,513 drop-tops that year. This one has the 250-cubic-inch (4.1-liter) L22, which was one of two six-cylinder mills available in 1968.

However, Morgan still needs an engine to power its art, and for its Plus Six model, which only just ceased production in 2025, the company used BMW's turbocharged 3.0-liter inline-6 engine, the B58.

Under its hood sat a 3.6-liter inline-six engine with 276 horsepower and 284 lb-ft of torque. This helped Mercedes compete with BMW's E36 M3, the first BMW M3 to use a six-cylinder engine.

A semi has room to spare for a long, tall inline-6, but will always be limited in how wide it can be. One trade-off of an engine with a long stroke is that it can't turn fast RPMs like a high ...