Packing a punch - from subcompacts to luxury sedans. Drive It! presents some powerhouses.Present it: Smart BrabusTuner Brabus is known for enhancing performance in Mercedes models. The Bottrop company hasn't shied away from the little Smart, either. The exterior of the souped-up midgets differs from their standard counterparts with improved aerodynamics and a brawnier design.The Smart Brabus's driving performance can't measure up to a real sports car, of course, but the point here is the fun, not the sport of racing. Drive it! checked out the Brabus Smart on a racetrack, on a country road, and on the Autobahn.Test it: Audi A3 e-tronWith the A3 Sportback e-tron, Audi enters the plug-in hybrid era. The combination of a 1.4-liter TFSI engine with 110 kW that produces 250 Nm of torque and a 75-kW, 330-Nm electric motor makes for a sporty ride.A dual clutch works together with the internal combustion engine, the electric motor, and the 6-speed S-tronic transmission. The Audi A3 Sportback e-tron can do 130 km/h on electricity alone. And a monitor shows the driver which comfort options are on and whether downshifting will increase the car's range.Inside it!: Porsche Panamera - Focus on TechnologyLook up "sedan" in a dictionary and you'll find descriptions like 4-seater, 4-door, or simply vehicle with room for four people and luggage. Not a word about sportiness. In 2009, Porsche changed that with the Panamera.Since then, sedans can definitely by sporty -- or, put another way, sports cars can have four doors. The Panamera's second generation aims to do everything even better. The sports sedan has changed not only externally, but also technologically. We took one out on the Lausitzring track to see how well all the innovations mesh.Vintage: Mercedes 220 SEbThe Mercedes-Benz 220 SEb was popularly known as the "big tail fin". The official name of the series introduced in 1959 was W111. The most innovative car in the series shone with elaborate fuel injection.In 1960, the 220 SEb won the prestigious Monte Carlo rallye on its first attempt and also the European Touring Car Championship. The engine wouldn't count as a fuel-thrift wonder today, of course. Driven aggressively, the 120-hp, short-stroke engine burns 14 liters or more per 100 km. But it does 170 km/h and has a lovely, powerful sound. The 220 SEb sets high standards. This sedan was one of the best cars of its day, was continually further developed, and remained in production for six years.