SEAT's next-generation Ibiza Ecomotive could beat the Toyota Prius to become Britain's lowest polluting car.
Sources at SEAT say it will use the Polo Bluemotion's highly efficient 75bhp 1.2 TDI to achieve its target 85mpg fuel economy while emitting less than 89g/km of CO2 - all without relying on a complex hybrid drivetrain.
Instead, SEAT engineers will optimise the Ibiza aerodynamics to cut drag, add small 15-inch wheels to reduce rolling resistance, lengthen the car's gearing and add stop/start plus regenerative braking.
Against the clock the Spanish-Fiesta rival is expected to mirror the Polo's performance figures hitting 62mph from standstill in 13.9 seconds and topping out at 107mph.
Pricing has yet to be announced for the Ibiza Ecomotive, which is expected to go on sale early next year, but it should be less than the Polo with prices kicking off at around £13,000 for the three-door SC model.
As well as the new diesel, the brand also confirmed it will add a punchy 105bhp 1.2 TSI petrol engine to the range. The flagship non-FR engine is expected to boast some impressive statistics, averaging over 55mpg while emitting less than 120g/km of CO2. Against the clock the new engine should ensure the Ibiza posts a 0-62mph time of less than 10 seconds.