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Audi RS6 Avant and Mercedes-AMG E63 S drag race for Top Gear

Sometimes the kids are late for school, and you need a wagon to get them there in a hurry. In its latest drag race, Top Gear finds out which is the quicker high-performance family hauler: the Audi RS6 Avant or the Mercedes-AMG E63 S. The specs suggest this race should be quite close at the finish line. The RS6 has a 4.0-liter twin-turbo V8 with 552 horsepower, but the E63 S is a little more powerful with 577 hp from a 5.5-liter twin-turbo V8. However, the Audi has a traction advantage from the all-wheel drive system, whereas the Mercedes only spins its rear wheels. Pick your favorite, and then watch the video to see if the similar numbers translate to a photo finish in the real world. Related Video:

Audi commits two R18 E-Tron Quattros to final Sebring race for LMP1 cars

We were baffled a few weeks back when the American Le Mans Series and Grand-Am Rolex Sports Car Series announced new classes that will make up their combined racing program in 2014. Gone from the list is the Le Mans Prototype class, otherwise known as LMP1. The LMP1 class has long been the top dog of endurance racing, both in Europe and the US, so we couldn't figure out why this newly minted racing series was jettisoning it like yesterday's donuts.
It appears as if Audi is confused by the move as well. The German brand has announced it will participate in this year's ALMS opening round, the famed 12 Hours of Sebring, as it does every year, and bringing two Audi R18 E-Tron Quattro hybrid race cars with which to compete. Unlike every other year, Audi is treating this year's race as its potential swan song in this famous Florida race.
There's a good reason that Audi is so fond of the 12 Hours of Sebring, as it debuted the gas-powered R8R there in 1999 that kicked off its participation in the upper echelon of endurance racing. The R8R preceded the R8, which debuted at Sebring in 2000 and won that race, starting an amazing career for that car that included five more wins at Sebring. The R8 was followed by the R10, then the R15 and R18, and finally we wind up at today's R18 E-Tron Quattro - all winners, all dominant, all exciting to watch.

2017 Audi A5 First Drive

It might not look it, but behind the 2017 Audi A5's evolutionary styling update there's a new platform and a host of mechanical and technological upgrades that make it the most advanced offering in its class. We got to sample the new A5 on the windy roads outside of Porto, Portugal, which gave us an in-depth look at the car underneath the unremarkable exterior. The A5 may no longer be the haute couture choice in this segment Í­– that title goes to the Mercedes-Benz C-Class Coupe – but there isn't a bad line on the new car, and it's more creased and toned than before. Given the bulging hood and chunky C-pillar, we'd say its gym membership is paying off. This might look more like a mid-cycle update, but what's underneath is new: a scalable architecture known internally at VW Group as MLB Evo, an optional seven-speed dual-clutch gearbox, and the third-generation EA888 2.0-liter, four-cylinder turbocharged gasoline engine. This engine debuted in the A6 and is rated at 252 horsepower and 273 pound-feet of torque. That's a healthy 32 hp and 15 lb-ft more than the 2016 A5's 2.0-liter offered, and it showed on our spirited drive through Portugal's grape-growing region. A handful of A5s will leave the factory with six-speed manuals, but most buyers will find a new seven-speed dual-clutch transmission in place of last year's eight-speed conventional automatic. Audi worked hard to improve initial throttle response to eliminate the clunkiness endemic to torque-converter-free transmissions. In urban slogging, the gearbox does a very convincing impression of a traditional automatic. In sport mode, the transmission livens up and delivers the rapid-fire shifts we expect from this type of gearbox. We did not have the opportunity to sample the stick. Our test car had Audi's Euro-spec version of this engine, which utilizes both direct and port fuel injection. American models will forgo the latter. Brisk acceleration is matched by a subtle growl piped in from under the hood at higher rpm – about the only noise you'll hear. The A5 is astonishingly quiet. In fact, it was that quietness that encouraged us to leave the coupe in the Drive Select's comfort setting for much of our drive. Drive Select tweaks the car's steering, throttle response, and, on cars so equipped, the optional adaptive suspension. Truth be told, Comfort rides a little too plush and Dynamic a little too firm.