Jaguar's got form when it comes to concept cars that never make it to production...

The concept is at least fundamentally sound unlike their last one-the dreadful gas turbine hybrid presented to th press withy great fanfare but left MB, BMW et al snickering into their sleeves

Because in the 100kw scale, piston engines are much more efficient. The can drive the wheeels directly via modest gear reduction. This eliminates the source of inefficiency of generating electricity-to charge a battery-to drive a motor to turn the wheels.

Turbines are noisy and require exotic materials to operate at temperatures required for the sorts of efficiencies that piston engines can easily achieve.

Diesel engines are already have efficiencies of over 40% peak, and over 30% over much of its torque map.Small turbines don't come close.

Rover and Chrysler fooled around with turbines in the 50s and 60s-and wasted a lot of money to conclude that piston engines were better. Gas turbines may have moved on-but so have piston engines.

If they were that good, you'd see them on small aircraft before cars because the duty cycle is more amenable to turbines. You don't.

It was a PR stunt on Jaguar's part.