2005 Audi S4 Base Sedan 4-door 4.2l on 2040-cars

Auto blog

Audi builds 5-millionth vehicle with Quattro

Quattro, the trademark name Audi has put on its all-wheel-drive system engineered for passenger vehicles, recently celebrated its five-millionth installation. The driveline has been offered in more than 140 different vehicles since its introduction more than three decades ago.
The all-wheel-drive technology made its world debut at the 1980 International Geneva Motor Show, beneath the floorpan of the Quattro Coupé, a low-volume two-door. It didn't take consumers long to embrace Audi's innovative approach. While most four-wheel-drive systems at that time utilized heavy transfer cases or second cardan shafts, Quattro was virtually tension-free, light, compact and efficient. Most importantly, enthusiasts found it was especially suitable for sports cars.
Today, the automaker offers Quattro on its full line of passenger vehicles and it is unquestionably successful (the technology enjoyed a 43 percent take rate in 2012). On models with transverse-mounted engines (A3 and TT), Audi uses an electronically controlled multi-plate clutch with hydraulic actuator. Under normal conditions, the clutch sends power almost exclusively to the front wheels (if wheel slippage occurs, up to 100 percent of the torque may be sent to the rear). Vehicles with transverse-mounted engines (A4, A5, Q5, etc...) use a self-locking center differential sending 40 percent of the engine torque to the front axle and 60 percent to the rear under normal conditions (it is able to send the majority of the power to the axle with better traction when needed). The highest-performing Quattro systems use torque vectoring to further improve cornering grip and speeds.

Conquest and controversy conclude the 2014 Rolex 24 at Daytona [spoilers]

If you don't wish to know who won the 2014 Rolex 24 at Daytona, you should avert your eyes right now. We'll even give you a double-space to skedaddle...
For those of you still with us, the first race in the United SportsCar Championship (USCC) is done, but the discussions about it certainly won't end for a while. Daytona Prototypes claimed the first four overall places, the top spot taken by the No. 5 Action Express Coyote-Chevrolet Corvette DP driven by Joao Barbosa, Christian Fittipaldi, Sebastien Bourdain and Burt Friselle. The 16th and final caution of the race bunched the field up for an eight-minute sprint to the flag, so the first place getter finished just 1.4 seconds ahead of the No. 10 Wayne Taylor Racing Dallara-Chevrolet Corvette DP driven by Max Angelelli. Third place went to Brian Friselle in the No. 9 Action Express Chevrolet Corvette DP, 20 seconds down. Chevrolet power hasn't taken the overall win since 2003, eleven years later it scores a one-two-three-four. The No. 6 Muscle Milk/Pickett Racing ORECA-Nissan 03 scored fifth place, the top LMP2 finisher.
The Prototype Challenge class win went to the No. 54 CORE Autosport team of Colin Braun, Jon Bennett, Mark Wilkins and James Gue.

Audi tops Consumer Reports' brand rankings while Tesla leads domestics at eighth

Tesla supplanted General Motors' Buick division as the top-ranked US automaker in Consumer Reports annual brand rankings, though the electric-vehicle maker finished eighth among global automakers. Buick had finished atop CR's domestic car-brand list for three years before Tesla leapfrogged it. Scores were calculated from a combination of performance, owner satisfaction, and reliability. CR noted that Buick scored big on reliability but not so high on performance, while Tesla appeared to present the opposite case. Volkswagen's Audi division repeated as the best overall brand for the second straight year, beating out VW's Porsche unit, BMW, Toyota's Lexus division, and Subaru. Kia and Mazda followed those brands, while Honda finished ninth, between Tesla and Buick. Consumer Reports took results from 31 brands. Reliability issues related to the Toyota Tacoma helped drop that Japanese automaker out of the top 10. Take a look at CR's results for its Annual Brand Report Card here. That Tesla, Audi, and Porsche placed so high is topical, given some of the issues plaguing those automakers. Audi, Porsche, and their parent VW have been coping with the effects of the diesel-emissions scandal that broke back in 2015. The scandal has cost Europe's largest automaker billions of dollars, and forced VW to put a stop-sale on diesel-powered cars in the US in late 2015. And while the Tesla Model S improved from the "worse-than-average" label CR gave it in its 2015 Annual Auto Reliability Survey, the problematic falcon-wing doors on the Tesla Model X SUV pulled that model's reliability scores lower last year. Additionally, the Model X's climate-control system and door locks have also caused issues. Toyota and Lexus finished atop CR's reliability rankings last year. Related Video: