I turned the key, and the engine immediately purred into life.

The engine purred and the big car slid away down the drive.

He thought of all that might go wrong, even though the engine purred steadily along.

Outside a car engine revved up and purred away into the night.

Even now the family was whooping it up as the engine purred past.

My colleague looked at him thoughtfully as the engine purred.

A few minutes later, an engine purred, headlights shining into the house.

Even before the door had closed, the engine was purring, and the car was away!

Somewhere in the ship engines purred with the hum of power.

By some small miracle, the rickety old engine purred to life.