Back in 1991, the Opel Kadett GSI was the hot hatch of the day. Or at least in my opinion it was, since this was the first car I owned. More than 20 years later, the Opel Astra OPC hopes to take the same place in the minds of young drivers. The Opel Kadett GSI has a 2.0-liter 16V engine with 150 PS, while the Astra OPC has a 2.0-liter turbocharged engine with 280 hp and 400 Nm of torque.