There are a number of key differences between the Infiniti engine and the version used in front-wheel drive applications.
As used in Infiniti models, the V6 diesel has a different cylinder block, a new design of crankshaft as well as new or revised intake manifold, fuel injection system, exhaust gas recirculation, turbocharger, oil sump and manifold catalyst. Furthermore, Infiniti claims that it is tuned differently for more responsive performance.
In the EX30d and FX30d, the 3.0-liter V6 diesel produces a maximum output of 238 horsepower and a heft 550Nm or 405 lb-ft of peak torque available from 1,750 rpm to 2,500 rpm, while as much as 500 Nm or 368.7 lb-ft is available from a mere 1,500 rpm.
In order to fit under the the bonnet of both the EX and FX models, Infiniti went ahead and created a new front subframe, altered the front bumper designs to enhance air flow into the engine bay and redesigned the sheet metal within the engine bay to house additional radiators needed for cooling.
Matted to a standard 7-speed Automatic transmission, the V6 turbo diesel propels the EX30d to 100km/h (62mph) in 7.9 seconds and the FX30d in 8.3 seconds.
The EX30d returns a combined fuel figure of 8.4 lt/100km (28mpg US or 33.6mpg UK) in the European cycle with 224 g/km of CO2. The equivalent figures for FX are and 9.0 lt/100km (26.1mpg US or 31.8mpg) and 240 g/km.
"The new diesel engine allows us access to a far greater sector of the market without compromising on our core values. More than that, it's an exceptional engine, with impressive torque from very low revs helping to deliver progressive, linear acceleration with none of the typical disadvantages of unwanted noise and vibrations," says Jim Wright, Vice President, Infiniti Europe.
"By creating a bespoke sporting diesel, we have been able to maintain the combination of performance and luxury expected from an Infiniti with the added bonus of lower emissions and improved fuel economy. It's a win-win position," Wright added.
Infiniti's European division will first launch the EX30d and FX30d onto the market with the M30d to follow later in the year. The diesel models will have their world premiere at the Geneva Salon in the beginning of March.
The Renault-Nissan Alliance has said in the past that it wants to offer its new V6 diesel engine on certain Nissan and Infiniti models in the States, but the company has yet to announce specific plans.
At this week's 64 International Auto Show in Frankfurt, the Japanese automaker put the spotlight on a one-off Infiniti FX50 designed in conjunction with Vettel. The special crossover features a host of aerodynamic, styling and mechanical improvements, all designed with Vettel's input. 
