1999 Audi A4 Quattro Base Sedan 4-door 1.8l on 2040-cars

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2015 Audi A3 TDI Challenge

I officially gave up after 758 miles. The 15 or so miles leading up to this decision were spent in the right lane of Southern California's I-8 freeway, hazard lights blinking, climbing uphill at just over 40 miles per hour. After two days of sweating to the oldies (okay, a mix of SiriusXM Classic Rewind and First Wave), I had covered those 758 miles in a 2015 Audi A3 TDI on one tank of diesel fuel. And when I say sweating, I mean it quite literally. In order to maximize fuel efficiency, my co-driver and I kept the air conditioning off, even when the direct sunlight in the California desert had outside temperatures hovering around 90 degrees. I had been doing this hypermiling exercise for two days, the car was getting stinky, and I was ready to hear the sweet "thhhhhhhwack" of satisfaction that would finally come from peeling my sweat-soaked self off the A3's leather seat. Sexy, I know.
Audi had challenged me to drive 834 miles from Albuquerque, NM to San Diego, CA, on just one 13.2-gallon tank of diesel fuel. If you believe the EPA's highway fuel economy rating of 43 miles per gallon, this means I should have sputtered to a stop after 568 miles. But I went a grand total of 758 - that's 59.4 mpg - and I could have kept going. In fact, two teams made it the full 834 miles on their one allotted tank of fuel. That's over 63 mpg. That's twenty miles per gallon better than EPA estimates.
The TDI Challenge took me through three states over the course of two days, and the 834-mile journey wasn't just a simple highway cruise. I negotiated uphill climbs, long series of involving switchbacks through the mountains and elevations that ranged from 220 feet below sea level to nearly 8,000 feet above. I learned that super-crazy-efficient driving like this an incredibly challenging game that takes serious skill. But I also learned that if you're going to attempt to stomp all over the EPA's numbers, the Audi A3 TDI is one heck of a car for the journey.

Win an electric car and celebrate Earth Day

Autoblog may receive a share from purchases made via links on this page. Pricing and availability is subject to change. No donation or payment necessary to enter or win this sweepstakes. See official rules on Omaze. Enter to win this giveaway or any other Omaze experience now through April 23, 2021 and receive 500 extra entries into any campaign plus a chance to win $10K with code GOGREEN500. Simply add the discount at checkout. Whether you like it or not, there will come a day when most, if not all of us, will be driving electric cars. For some of us that day can't come soon enough, and in honor of Earth Day we've put together a list of our favorite car giveaways so you can save some green while being green.  Win a 2021 Porsche Taycan Turbo S and $20,000 - Enter Here If there’s one thing Porsche is good at, itÂ’s making fast, beautiful cars, and the Taycan Turbo S is no exception. Making 750 horsepower, 774 lb-ft of torque and a top speed of 161 miles per hour, punching the accelerator will surely throw you back in your seat. In fact, its 0-60 time of 2.6 seconds matches that of the quickest Porsche 911 ever made, the Turbo S. The difference between this Taycan Turbo S and that 911 Turbo S, of course, is that the only reason youÂ’ll ever need to stop off at a gas station is to fill up on snacks. That and the fact the Taycan doesn't actually have a turbo anywhere in the car. We wouldnÂ’t be reaching for a bag of FlaminÂ’ Hot Cheetos, though, because this incredibly comfortable leather interior is immaculate, and weÂ’d hope to keep it that way. Enter here for a chance to win this prize worth $220,000. Win a Himalaya Land Rover Defender 110 EV and $20,000 - Enter Here The Land Rover Defender is an icon: an intense, luxurious off-roader that turns heads and can crawl up nearly anything. The problem? For the past 20+ years it hasn't been available in the United States and it's never been what youÂ’d call environmentally friendly. But this Defender is different. ItÂ’s vintage, restored by Himalaya and itÂ’s all-electric. At 275 horsepower, you wonÂ’t be thrown back in your seat, but the 406 lb-ft of torque helps make this an incredibly capable rock crawler.

Audi A7 Sportback H-Tron Quattro packs plug-in hydrogen powertrain

If you think a plug-in diesel hybrid is an expensive proposition, just wait until you hear details about the just-revealed Audi A7 Sportback H-Tron Quattro. The "H" in H-Tron, as you might guess, stands for hydrogen, so say hello to a new concept that combines a plug-in battery system with a hydrogen fuel cell. Yeah, exactly. Let's start with the numbers. On the plug-in side, the new H-Tron has an 8.8-kWh lithium-ion battery that can power the car for up to 31 miles on battery power. With electric motors on both axles – it's a Quattro, after all, but a through-the-road hybrid with electronic torque distribution management – the A7 H-Tron uses a hydrogen fuel cell and four (!) H2 tanks to offer about 62 miles per gallon equivalent. Audi says the overall fuel cell stack efficiency is "as high as 60 percent" while the electric motors operate at 95 percent efficiency. Efficiently turning all of that electricity into movement means the A7 Sportback H-Tron Quattro has a total power output of 398.3 pound-feet of torque. The 4,299-pound concept can allegedly go from 0-62 miles per hour in 7.9 seconds and has a top speed of 112 mph. The car's total range is 311 miles. The A7 H-Tron is not the first plug-in hydrogen vehicle concept. That title goes to the Ford HySeries Edge. Mazda also considered putting a hydrogen range extender in the Mazda5 plug-in van. The Audi A7 Sportback h-tron quattro It sprints from 0 to 100 km/h (62.1 mi) in 7.9 seconds and on to a top speed of 180 km/h (111.8 mph). It covers over 500 kilometers (310.7 mi) on one tank of fuel – and its exhaust emits nothing more than a few drops of water: The A7 Sportback h-tron quattro, which Audi is unveiling at the Los Angeles Auto Show 2014, uses a powerful, sporty electric drive with a fuel cell as its energy source that operates in combination with a hybrid battery and an additional electric motor in the rear. The overall electrical system power of 170 kW is transferred to both the front and the rear wheels. This drive configuration makes the emission-free Audi A7 Sportback* a quattro through and through – a new departure in fuel cell cars. "The A7 Sportback h-tron quattro is a genuine Audi – at once sporty and efficient. Conceived as an e-quattro, its two electric motors drive all four wheels," explained Prof. Dr. Ulrich Hackenberg, Member of the Board of Management for Technical Development at Audi. "The h-tron concept car shows that we have mastered fuel cell technology.