When it comes to fuel efficiency, the 2022 Porsche Panamera 4S E-Hybrid Sport Turismo Wagon beats all its rivals with a very respectable margin. The Porsche Panamera 4S E-Hybrid Sport Turismo offers more than twice the fuel economy compared to the rivals. It also offers the best-in-class range, which makes it an even better choice for a wagon. TheMercedes AMG E 63 wagon offers the least fuel economy, followed by the Volvo XC90 T8 Inscription hybrid. The Audi RS6 Avant offers decent fuel economy but has the smallest fuel tank capacity in the segment. The 422 hp engine offers 840 Nm (627 lb-ft) of torque. It is mated to an 8-speed automatic transmission fitted as standard. As it is normal for this kind of big torque, the Panamera review 4S is offered with all-wheel-drive system.