As the name suggests, the new model used a new BiTurbo 2.0-litre diesel engine delivering 198bhp and even faster 0-60mph times than the standard turbocharged 2.0-litre unit.
In five-door hatchback form, the Vauxhall Insignia BiTurbo can accelerate to 60mph in 8.2 seconds, an improvement of a second over the previous 160bhp engine.
However, because of the introduction of fuel-saving technology such as Start&Stop, the new Vauxhall Insignia BiTurbo actually improves fuel economy by 2.2mpg to an impressive 57.6mpg.
It also reduces CO2 emissions to below 130g/km, one of the lowest of any car to offer nearly 200bhp of power and with repercussions in the shape of lower road tax rates for private buyers and BIK tax for business users.
The new engine is available in hatchback and Sports Tourer variations and in front-wheel drive or all-wheel drive.
It also comes in one of four specification levels, with the range-topping Elite models offering an automatic gearbox for both body styles.
The hatchback Insignia BiTurbo is the least expensive in the range, starting from £27,120 for entry-level SRi models.
This includes 17″ alloy wheels, sports pedals, leather covered steering wheel, front fog lights and essentials such as air conditioning and a sound system with CD and MP3 capabilities.
However, the BitTurbo is also included in more generously-equipped SRi VX-Line, SE and gadget-packed Elite models with a rising price scale topping out at £33,320.
Vauxhall’s Flexride system, which adjusts damper settings to how the car is being driven, is available as standard with the new engine. Previously it was only an option on Insignia models.
The new Vauxhall Insignia BitTurbo is on sale now in UK Vauxhall dealerships.