This week drive it! tests some fast sports cars, modern station wagons and a vintage pickup truck.admire it: Audi RS 5A coupé that combines classic elegance with breathtaking power: the Audi RS 5.The high-revving, 4.2-liter V8 delivers 450 horsepower. As in all high-performance Audis, that power is delivered to the road by an advanced permanent all-wheel-drive and a 7-speed S-tronic dual-clutch gearbox. The result is a car that roars from 0 to 100 km/h in just 4.6 seconds. An electronic speed limiter restricts top speed to 250 km/h, though Audi will adjust that upward to 280 km/h if the customer desires. Audi’s newest RS model reaches showrooms this summer. compare it: Opel Insignia - VW Passat - Honda AccordStation wagons rule in Germany.Three-quarters of all VW Passats sold in Germany in 2009 were station wagons. Opel's entry into the market is the Insignia Sports Tourer, which represents about half of all the Insignias sold in Germany last year. This week drive it! compares the two German station wagons with a competitor that's relatively rare on German roads, the Honda Accord Tourer. Which is the best and which offers the most for the money? present it: Peugeot RCZPeugeot is known for its practical small cars, family-friendly sedans, cute convertibles and even SUVs. Now it's added a vehicle that one might not have expected from the French carmaker.The RCZ is Peugeot's brand new sports coupé. With its low-slung shape and distinctive bubble-like roofline, the RCZ seeks to attract a new kind of clientele to the French brand. The basic model comes with a 155-hp gasoline engine. Also available are a 200 hp gasoline engine and a diesel. inside it: Automotive NanotechnologyNanotechnology is finding applications in plastics, paints and textiles. That has implications for automobiles as well.Nanoparticles are increasingly being used in the construction of modern automobiles. They help make car paint tougher and longer-lasting, improve the performance and efficiency o...