21.   A few minutes later she heard the rich throb of a car engine in the drive below.

22.   Thomas Davidson was stopped by police last week when delivering pizzas and asked if his car engine could be inspected.

23.   THE Government could face repair bills from thousands of motorists whose car engines have been damaged in tests on toxic emissions from diesel exhausts.

24.   As he walked around, he heard the sound of a car engine or someone making the sound of a car engine shifting gears.

25.   A man drives on the freeway and his car engine blows a piston.

26.   A young friend supplied a catalyst by asking him how a car engine works.

27.   But he says that previous attempts to use flywheels in car engines have foundered because the energy in the wheel dissipates very quickly.

28.   But so far no company has successfully produced a mass-market version, although Philips Electronics tried unsuccessfully about three decades ago to introduce a Stirling car engine.

29.   Car engines roar and fade on the street outside.

30.   Car engines that drive the rear wheels sit under the front hood because horses pulled carts from the front.