Volvo’s commitment to electrification is flourishing up and down its lineup, and the S90 Recharge benefits from this enlightened direction. Just a few years ago, a full-size luxury sedan needed a big V8 engine, or at least a turbocharged V6, under the hood to merit serious consideration. The S90’s T8 package uses a front-mounted 2.0-liter four-cylinder supercharged and turbocharged engine with a rear-mounted electric motor to generate 400 horsepower and 472 pound-feet of torque combined. A second electric motor, mounted on the crankshaft, acts as a starter-generator and modulates transitions between the engine and the rear motor. The starter-generator can also provide additional power in demand situations, adding up to 111 lb-ft of torque. An 11.6-kilowatt-hour battery lives on the center tunnel, a placement centralizing mass while offering protection in crashes.
If all that sounds complicated, it is. The good news for drivers, though, is that Volvo engineered transparent operation into the system. You don’t need to understand how it all works to take advantage of the performance on tap.
The S90 Recharge is a plug-in hybrid electric vehicle (PHEV), a somewhat misleading designation. To fully exercise the powertrain’s capabilities, you can connect your S90 to power with the included charging cable. Using standard household current, you can charge the battery from empty to full overnight. If you have access to a 240-volt outlet, the charging time goes down to about three hours. If you aren’t near an outlet or charging station, no worry – the S90 can operate like a “traditional” hybrid, using its starter-generator and regenerative brakes to refresh the battery during operation.
If you do charge your S90, though, you have the option of using Pure mode, one of the five driving modes available. Pure mode maximizes driving on battery power, reducing some energy-consuming functions. Dynamic performance is reduced, and Pure mode only works up to 78 mph. In Pure mode, you can drive up to 21 miles without using a drop of gas, according to the EPA.
In addition to Pure mode, the other driving modes are Hybrid, Power, AWD, and Individual. Hybrid is the default mode and balances the gas engine and electric motor for efficiency, performance, and comfort. Power mode uses both the engine and motor in parallel for quick response and maximum performance and drives both the front and rear wheels. All-wheel drive (AWD) mode should be engaged in slippery conditions, as it distributes the power from front to rear to improve traction. Individual mode allows savvy owners to set up their own parameters. This mode is programmed to each key fob, so each driver of the S90 can save an Individual mode.
The EPA gave the S90 Recharge an efficiency rating of 60 MPGe combined on electricity, and a 30 mpg combined fuel-economy rating in gasoline-only mode.
Driving the S90 Recharge is a pleasure and can deliver thrills, too. The car has excellent balance, a smooth ride, and predictable power delivery via the eight-speed automatic transmission. The start/stop function of the gas engine is seamless, and the cabin is quiet and serene, even under heavy acceleration. Steering is direct and sharp, and the body stays flat through turns. This is not pillowy luxury; it is crisply tailored luxury.