Petrol & Ink

Car questions, answered.

Straight answers to the car questions people actually type into a search bar. Where a term has a real engineering definition, you get it with the source it came from. Where it does not, the page says so instead of pretending otherwise.

Car language splits into two halves, and telling them apart saves a lot of arguing. Some of it is measurement: horsepower, torque and displacement are defined quantities with units behind them, and a spec sheet quoting them means something specific. The rest is category: hot hatch, supercar, JDM, GT. Those are words the motoring press settled on, not classifications anybody certifies, which is why no two people draw the lines in quite the same place.

Power, in numbers

How the engine breathes

The kinds of car

None of this is here to sell you anything. When the reading is done and a wall is the next question, the art is where the pictures start and the wall deals with size and framing.

Written by Craig Fearn, Petrol & Ink. Last updated .

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What is horsepower? →

Horsepower is a unit of power, meaning a measure of how fast work is done. One horsepower is 550 foot-pounds per second, which is about 745.7 watts.