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SRT Viper dukes it out with Mercedes SLS Black Series in new Head 2 Head

In Episode 36 of Motor Trend's Head 2 Head, now that the Corvette ZR1 is no more, Jonny Lieberman has to look overseas to the Mercedes-Benz SLS AMG Black Series for a challenger with similar philosophy to the SRT Viper: long hood hiding a high-horsepower engine set way back, rear-wheel drive, tiny trunks. That puts the Viper's 8.4-liter V10 with 640 horsepower and 600 pound-feet of torque against the SLS AMG's 6.2-liter V8 with 622 hp and 468 lb-ft.
However, the congruences in philosophy and magnitude of numbers doesn't translate to the driving experiences of the two, which are literally and figuratively on different continents. Lieberman gets a handle on the two of them on Northern California roads, Randy Probst then finds out how, and how quickly, they can lap Laguna Seca.
They both get kudos for being improvements on their original sources, but only one of them can take the win. You can find out by watching the video below.

Autoblog's adventures at the Nurburgring 24-Hour race [spoilers]

The brand-new Audi R8 LMS, said to share 50 percent of its components with the street-legal R8 shown off at Geneva, has won its very first race at the 2015 Nurburgring 24-Hours. The No. 28 car driven by Christopher Mies, Edward Sandstrom, Nico Muller, and Laurens Vanthoor for the Audi Sport WRT team out of Belgium finished only 40.279 seconds ahead of the No. 25 BMW Sport Team Marc VDS Z4 GT3 in second place, for the smallest winning gap since the race began in 1970. Those two cars traded the lead throughout Sunday morning and were less than a minute away from one another for the last two hours. They were part of a total 35 lead changes during the entire race – a record for the event – and both did 156 laps. Third place went to the No. 44 Falken Tire Porsche 997 GT3, one lap down. The Audis did what they always do: lurked close to the front, stayed out of trouble, then pounced when everyone else faltered. For the opening stretches the BMW Z4 teams owned it, running 1-2-3 for a while, but all of them hit trouble. When morning came and the race got over its yellow-flag fever, the No. 28 Audi was in front and stayed there. It was the third Nurburgring 24-Hour win for Audi in four years, the brand's first win only coming in 2012. Last year's winner, the Phoenix Audi team that set a race record by doing 159 laps, had both of its cars retire. One hit an oil patch about 12 hours in, spun and was hit by another car behind, taking on too much damage to continue. The other retired with engine issues. Other Notes Three cars crashed out of the race while leading, after the rains that weren't supposed to happen, happened about 90 minutes in. The No. 20 Schubert BMW Z4 led the first 50 minutes of the race, hopped a crest at Pflanzgarten, landed in a pool of water, and hit the wall on the 30th lap. Then the No. 30 Frikadelli Porsche, with a driver team that included ex-'Ring Taxi driver Sabine Schmitz, hit the No. 31 Mercedes SLS AMG GT3 on the approach to Carrousel and crashed out. Then the No. 1 Phoenix Audi, last year's winning car, took the lead but hit the wall after that oil patch near Pflanzgarten and was out of the race. Aston Martin celebrated a class win in the SP8 category with the No. 49 Vantage GT4 N430. This being the tenth anniversary of the Vantage running the Nurburgring-24, this year's car was painted in the same colors as the racecar from ten years ago.

Recharge Wrap-up: Houston's bus revival, autonomous trucks on the Autobahn

A documentary shows how Houston, Texas significantly improved its outdated bus system. Called High Frequency: Why Houston is Back on the Bus, the short film describes how the city reimagined its bus system to become more efficient, more useful and more popular. Despite some opposition, the change has proven to be effective, with bus ridership up eight percent in three months, and light rail ridership up due to complementary bus routes. See the video above, and read more at CityLab. Automakers sent autonomous semi trucks on the German Autobahn as part of the European Truck Platooning Challenge of 2016. Mercedes-Benz, Volvo and Scania, among other groups, sent platoons of trucks between Stuttgart, Germany, and Rotterdam, Holland. In Mercedes's platoon of three trucks, the lead truck was fitted with lasers and other sensors to guide the convoy down the road. The two following trucks relied on vehicle-to-vehicle communication to trail 50 feet behind the lead, making room for cars to come between them and closing the gaps when able. The close following distance provides fuel economy gains of up to 10 percent in the rearward trucks on account of the reduction in drag. Read more at Hybrid Cars. Renault has reduced NOx emissions in its Euro 6b diesel vehicles in real world driving conditions. By improving its exhaust gas recirculation systems and NOx traps, nitrogen oxide emissions are cut in half on average, under certain driving conditions. The improvements will be included in vehicles leaving the factory beginning in July of 2016. Beginning in October, owners of Renault Euro 6b diesels can have the modifications added to their cars for free. Read more from Renault. Tata Technologies is creating an innovation lab in California to partner with EV technology companies. Having a tech center in California allows Tata to work on technologies that will largely be deployed in the company's main market of Asia. "Today, we are partnering with companies and startups who have aspirations to sell in China, but a lot of what they do is in California," says Samir Yajnik of Tata Technologies. Read more from The Economic Times. BMW's i Ventures is investing in mobility-as-a-service software provider RideCell. RideCell provides technology for services such as carsharing, ridesharing and other transit services. "The convergence of transportation trends in cities is of key importance to BMW," says Ulrich Quay, head of BMW i Ventures.