The engine currently satisfies ECD III derogated Diesel emissions legislation when installed with an appropriate specified oxidation catalyst.

The basic engine is a conventional 4-cylinder with 2 valves per cylinder operated by a single overhead camshaft and hydraulic tappets.

The block is made of cast iron with aluminum alloy cylinder head and sump.

Camshaft and injection pump drives are via two multi-toothed belts with either automatic or manual tensioners.

It used Lucas electronic unit injection, instead of the L series' direct-injection system, as well as a through-flow cylinder head and a very different ancillary equipment layout.

When the Rover Group was taken over by BMW, they brought their own range of diesels which rendered the 2-litre and 3-litre Storm engines unnecessary.

Only the Td5 entered production as this was the only diesel engine of BMW or Rover that would fit lengthwise in the Discovery and Defender with sufficient power output and had the then up-to-date direct-injection system.