Ingenium. Sounds like an over-the-counter laxative, is actually Jaguar-Land Rover’s shiny new family of lightweight, turbocharged four-cylinder petrol and diesel engines, details of which have been revealed today.

Due to debut in next year’s 3-Series-rivalling Jag XE (above), Ingenium engines will thereafter be rolled out right across the JLR range.

But what is Ingenium, exactly? Well, like BMW’s ‘B-Series’ engines found in the new Mini, i3 and i8, every Ingenium block will share the same bore, stroke, cylinder spacing and 500cc cylinder capacity.

All shall be based around an aluminium block, saving some 80kg on JLR’s current generation of four-cylinder engines, and all will get direct injection, stop-start and variable valve timing.

The first engine off the line will be the 2.0-litre diesel, dubbed AJ200D, in the XE. No [...]