The German car maker Opel will present at the 2013 Frankfurt Auto Show the new Monza Concept. According to some rumors, the upcoming model will be based on a shortened version of the Cadillac ATS platform and it will come with rear-wheel drive. 

Under the hood, the Monza production version will come with a variety of four and six cylinder engines with displacements between .0 liter and 3.6 liter. 

According to the same rumors the range topping will be a six cylinder 3.6 liter unit awaited to develop 325 horsepower. The engines resources will be put to the ground via a six speed manual transmission or via a six speed automatic gear box.

Source: WCF