straight-six
noun1
Automotive, Engineering, Natural sciences, Physical sciences, Transport, Vehicles An internal combustion engine, with six cylinders mounted in a straight line along the crankcase with all the pistons driving a common crankshaft.
- He spent extra for a V8 because he doubted that a straight-six would be enough for towing his trailer.
2
Dated, Metonymically A vehicle with such an engine.
- His grandpa was driving a straight-six at a time when few people had one.