Jaguar XE Ingenium engineJaguar Land Rover has announced its new Ingenium 2.0-litre four-cylinder turbo engine family will begin production in early 2015 and deliver class-leading CO2 emissions, refinement, power and torque. 

The engines have, revealed Jaguar Land Rover engineers at a Gaydon briefing, been thoroughly benchmarked against dozens of rival engines in order to achieve this – and CO2 is key. The current CO2 champions of the turbodiesel junior exec class are the Audi A4 2.0 TDI ultra and BMW 320d EfficientDynamics, both on 109g/km CO2 (that’s 67.3mpg).

Jaguar claims the new Ingenium turbodiesel-engined XE saloon will step significantly ahead of both – delivering the first sub-100g/km CO2 non-hybrid junior executive car on sale. That equates to 74.3mpg.

The firm’s confident it will achieve this because it has already got near to 100g/km in initial compliance testing. It hasn’t yet dipped below the 100g/km CO2 barrier but is certain to before production car certification is required.

Jaguar Ingenium: the 250hp 2.0-litre turbodiesel?

The new Jaguar XE 2.0 Ingenium will also boast class-leading refinement, promises Jaguar – and higher-spec versions will produce class-leading levels of torque and horsepower, too. The current 2.0-litre turbodiesel power leader is the BMW 325d, on 218hp and 332lb ft of torque.

Jaguar suggests the high-power Ingenium delivers similar power to its 3.0-litre V6 diesel, indicating at least 240hp. The suggestion that there’s some overlap between 2.0-litre and 3.0-litre turbodiesels means 250hp could be on the cards…

All Ingenium engines will feature turbochargers, high-pressure direct fuel injection, variable valve timing and engine stop-start. The high-power diesels are likely to feature twin turbochargers: Jaguar appears to have ruled out ‘twincharger’ supercharger/turbocharger solutions, with engineers arguing its twin-turbo solution delivers similarly instant low-rev response.

Indeed, Jaguar is confident the Ingenium engine’s transient response will be best in class.

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There will be dynamics benefits too, adds the firm. Despite delivering similar performance to the 3.0-litre V6 diesel, the Ingenium four-cylinder weighs a hefty 80kg less. This will pay dividends for ride and handling, front-wheel traction and overall vehicle dynamics and response.

Land Rover will benefit too: the Ingenium engines will also go in the new Land Rover Discovery Sport. Both Jaguar and Land Rover engines will be surprisingly similar, despite the differing needs of the brands – key changes can be counted on one hand, said an engineer. Yes, he revealed, the Jaguar engine is as wade-proof as the Land Rover motor…