With 197bhp, 300Nm of torque and a top speed of 234km/h, a high performance version of the new 1.6-litre SIDI turbo engine will globally premiere in a Vauxhall Cascada at the upcoming Frankfurt Motor Show.

The engine is one of the newly-designed Vauxhall four-cylinder SIDI (Spark Ignition Direct Injection) units and will join the existing 167bhp 1.6-litre SIDI turbo, available from its launch.

The new power unit delivers 11 percent more power, including 300Nm maximum torque with overboost - 70Nm more than the comparable 1.6-litre turbo predecessor.

At the heart of the SIDI turbo is a new engine block that can withstand a maximum combustion pressure of up to 130 bar in the cylinder. The block is made of grey cast iron with an aluminium baseplate. A different type of piston was also developed on top of a reduced compression ratio.

Vauxhall engineers also achieved a high power output with exceptional refinement by optimising the car