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Tom Kristensen walks through a perfect lap of Le Mans in Forza 5

One of the best ways of learning a new track, aside from driving it, is to hear someone that's intimately familiar with it give you a good walkthrough. That's just what you'll get here, as the winningest driver in 24 Hours of Le Mans history, Tom Kristensen, walks you through the Circuit de la Sarthe's high-speed, 8.5-mile strip of pavement.
Kristensen is dubbed over scenes of drivers from a Forza Motorsport 5 contest lapping the track at the wheel of an Audi R18 E-Tron Quattro, adding a bit of visual sense to the Danish drivers description of the track.
With the 2014 24 Hours of Le Mans kicking off this weekend, this is just the sort of video you'll want to watch to get you in the mood. Take a look below, and then let us know what you think in Comments.

A luxury crossover for people who like to drive | 2018 Audi Q5 First Drive

1.6 million. That's how many Q5s Audi has sold since the model's 2008 debut, making the agreeable but stylistically neutral sport-ute the best-selling premium SUV on the planet. One in four Audis sold is a Q5, which is a big part of why the German carmaker made significant improvements intended to ensure the 2018 Audi Q5 is another success story. For starters, the Q5 has swollen in size. Not by much – we're talking 1.3 inches in length, half an inch in wheelbase, and incrementally more height – but enough to boost rear legroom by 0.39 inch and add 0.31 inch to rear headroom. If you're worried that curb weight has bloated in direct proportion to the larger footprint, fear not: The 2018 model is actually up to 198 pounds lighter than the model it replaces, thanks to a carefully modulated blend of high tensile steels and aluminum in the chassis, and incremental weight savings throughout. Two turbocharged engines are available: the Q5's 2.0-liter TFSI engine producing 252 horsepower and 273 pound-feet of torque (doing the 0-to-62-mph sprint in 6.4 seconds), and the SQ5's 3.0-liter TFSI mill that turns 354 hp and 369 lb-ft (capable of whisking it to 62 mph in 5.2 seconds). The 2.0-liter meets a new seven-speed dual-clutch S tronic transmission, while the beefier 3.0-liter gets a conventional eight-speed torque-converter-equipped gearbox to handle the higher torque. Audi's new Quattro ultra setup (already seen in the A4 and Q7) offers fully variable torque distribution that helps achieve 20/27 mpg with the 2.0-liter and 18/26 mpg for the 3.0-liter. The system can de-couple the rear axle via an electronic clutch, which improves fuel economy; with 100 percent of torque directed to the front wheels during straight-line driving, the parasitic losses of running power needlessly through the rear differential are avoided, while a second clutch controls front/rear torque distribution. Audi says the ultra setup works proactively, not reactively, using torque vectoring to distribute power and anticipating changes in vehicle dynamics 500 milliseconds before the torque is redistributed. While there are numerous tech updates under the skin, the body itself is very familiar. In person, the Q5's looks are tweaked ever-so-slightly thanks primarily to a curvier, crisper character line that is so sharp, it casts its own shadow under certain lighting conditions. Inside, a Q7-like upgrade gives the cabin a more sophisticated feel.

Audi is working on a suspension that gets power from bumpy roads

Regenerative brakes aren't new. They're on virtually every hybrid and EV, and they're even starting to pop up on traditional gas-powered cars, like with the i-ELOOP-equipped Mazda6. But even with these systems, cars can get more efficient, and Audi thinks it found yet another source of wasted energy. The source? The suspension. The idea is to turn the kinetic energy that goes into the dampers into usable energy instead of as waste heat. Audi isn't the first auto company to come up with regenerative suspension – nearly three years ago, ZF introduced its GenShock technology, which used a valve attached to traditional, oil-filled hydraulic shocks to recapture kinetic energy from movement caused by bumps in the road. Audi's prototype technology, which it calls eROT, replaces traditional dampers with horizontally oriented electromechanical rotary dampers. eROT is apparently short for electromechanical rotary damper. Neat. In testing, eROT recovered an average of 100 to 150 watts on a typical German road, three watts from a fresh piece of pavement, and 613 watts on a rough stretch of tarmac (wattage is calculated as power over time, so this is actually the rate at which the system harvests energy). The dampers channel that energy to a tiny, 0.5-kWh, 48-volt battery. The prototype is claimed to cut CO2 emissions by three grams per kilometer (4.8 grams per mile), while the company believes a future production version could save up to 0.7 liters of fuel per 100 kilometers of driving. Converting the savings to American miles per gallon isn't easy, so we'll use a practical example. In the US, the Q7's supercharged 3.0-liter V6 returns a combined rating of 21 miles per gallon, which works out to 11.2 liters per 100 kilometers. Apply eROT's 0.7L/100km savings, and the Q7's economy would improve to 10.5L/100km, or 22.4 mpg, a 1.4-mpg improvement. That's not huge, but because math, 0.7L/100km is more dramatic on a more fuel efficient vehicle – taking an A3's 27-mpg combined rating and adding eROT would drive efficiency up 2.4 mpg, for example. There are a few other big benefits beyond fuel and emissions savings – Audi claims eROT provides a more comfortable ride than traditional active suspensions, because engineers can tune the compression and rebound strokes independently of each other. Beyond that, the horizontally oriented rear suspension geometry means more cargo space, since the dampers don't poke up into the cabin like they normally do.