Like the regular Panamera, the range-topping Sport Turismo mates a 542bhp turbocharged 4.0-litre V8 engine with a 134bhp electric motor.
Combined, the system puts out a maximum of 671bhp and 627lb ft and enables the four-wheel-drive estate to hit 62mph from rest in 3.4sec – 1.4sec quicker than the regular E-Hybrid model.
The Turbo S E-Hybrid, which produces its maximum torque from just 1400rpm, can also sprint from 0-124mph in 11.9sec, which is just one second slower than the 911 GT3 RS can manage. Top speed is 192mph.
The Turbo S E-Hybrid uses an eight-speed automatic gearbox and promises combined fuel economy of 97mpg, according to the NEDC test.
Its 14.1kWh lithium ion battery can be recharged in 2.4 to six hours, depending on the power outlet it’s connected to. It can run in full EV mode for up to 31 miles with a top speed of 87mph.
The fitment of the battery into the car’s floor has removed 95 litres of storage space from the boot, but the capacity still stands at 425 litres with the rear seats up. There's seating for two adults and a child across the rear bench, and the seatbacks can be folded electrically in a 40/20/40 split.
As standard, the Sport Turismo Turbo S E-Hybrid gets 21in alloy wheels, Porsche Dynamic Chassis Control and torque vectoring. There’s also a rear limited-slip differential and ceramic composite brakes, as well as adaptive three-chamber air suspension with Porsche Active Suspension Management.
Pricing starts at £140,868, making the Turbo S E-Hybrid the new range-topping variant of Porsche’s Audi RS6 Performance and Mercedes-AMG CLS 63 Shooting Brake rival. Order books are open now, with deliveries beginning early in 2018.