General Motors Company’s [NYSE:GM] European unit Opel is introducing an updated version of its Insignia range of sedans, wagons and liftback hatch at next month’s 2013 Frankfurt Auto Show. The Insignia is essentially the Buick Regal’s European twin, and just as the Regal has a high-performance GS variant so does the Insignia, the Insignia OPC.

The Insignia OPC is actually more powerful than the Regal GS and offers more bodystyles and standard all-wheel drive. The car was first launched in 2009 and is being updated for the first time.

Motivation comes from a twin-turbocharged 2.8-liter V-6, whose output remains unchanged at 325 horsepower and 321 pound-feet of torque. When fitted with a six-speed manual, the Insignia OPC sedan and liftback need just 6.0 seconds to accelerate to 62 mph while the Sports Tourer will do the feat in 6.3 seconds. Top speed is 167 mph, when unrestricted, and a six-speed automatic is available as an option.

Most of the changes for the latest Insignia OPC can also be found on the regular Insignia range. These include tweaks to the styling, a bit more chrome and a revamped interior with an 8-inch touchscreen display and touchpad surface located on the dash and center console. For the Insignia OPC, there is also a performance steering wheel that includes paddle shifters for the car’s available automatic.

There are some mechanical updates, too. The chassis of the Insignia OPC has been enhanced, with a special focus on the rear axle. Things like the electronic stability and damper settings were tweaked and the noise and vibration levels reduced through other means of fine-tuning.

No changes were made to the all-wheel-drive system, which incorporates a Haldex-style clutch and electronic limited-slip differential. It constantly adapts to prevailing road conditions and varies torque distribution seamlessly from zero to 100 percent between the front and rear axles, as well as between the rear wheels. Brembo brakes also remain standard on the latest Insignia OPC.

For more from the 2013 Frankfurt Auto Show, click here.