Five firefighting trucks are shortlisted, each one a class of its own in its field; it's time to see how they fare when set against each other in five crucial tests.

Five super trains are shortlisted, all are engineering wonders in their own right.

Specifications of five of the world's largest aircraft.

Undertaking a global search for the ultimate giants of engineering genius; mechanical marvels are put under the spotlight and pitted against each other to establish a winner.

Several trucks are featured, each one a mechanical marvel; five are shortlisted to determine which is the toughest truck.