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How VW's hyper-efficient XL1 will influence the next Golf

In 2007, the European Union mandated fleet average CO2 emissions of 158.7 g/km. For 2015, that figure will drop to 130 g/km, and the target for 2020 is an ambitions 95 g/km. Thanks to some German politicking, that target will be phased in from 2020 to 2024, but it will still apply to 80 percent of passenger cars in that first year. In US miles per gallon, that's the equivalent of going from about 35 mpg to 42 mpg to 57 mpg. The current Volkswagen Golf is rated from 85 g/km of CO2 to 190 g/km depending on model - and zero for the e-Golf, so for the next-generation MkVIII hatch due in 2019, to meet the goal, Volkswagen engineers will need to introduce a bunch of new tricks. According to a report in Autocar, VW be mining its hyper-efficient XL1 for some of them.
Predictions for the next Golf include a variable-compression engine, an electric flywheel and an electric turbo, along with taking greater advantage of coasting. Volkswagen could be getting help from Audi with the electric turbo and variable-compression engine and electric turbo, with Audi already having shown off the former and brand technical boss Ulrich Hackenberg confirming the VW Group is working on the latter. It's possible the flywheel system could also have the mark of The Four Rings: Autocar mentions a British system that Volvo is testing, but the R18 e-tron Quattro racer has been using one for years.
The need for such features is because the company won't be able to net enough future gains from just aerodynamic improvements and advanced materials. As price will be a factor (the regulations are expected to "add hundreds of euros to the cost of building a car"), adding much more aluminum or carbon fiber is an unlikely option. We're told the next generation won't be longer or wider than the current car, and being Europe's most popular model, VW doesn't want to make a big bet on futuristic aero, but the report says the MkVIII will "likely" have "the most aerodynamic treatment yet seen on a production vehicle," the area where lessons learned from the XL1 will truly be seen.

1000-hp Mk1 VW Golf is terrifyingly cool

There are plenty of things to love about the Mk1 Volkswgen Golf. The machine's horsepower isn't one of them. From the factory, the little hatch cranked a breathy 112 horsepower from the most robust form of its 1.8-liter four-cylinder engine. Boba motoring, however, has taken that figure and multiplied it by a factor of nearly 10. If 1,000 horsepower sounds terrifying in a machine with a wheelbase of just 94.5 inches, it should. A massive Garrett GTX4202R turbo force-feeds the little mill through a tweaked 16-valve KR head. The crew calls the beast the 16Vampir, and we think that's fitting.
Of course, we'd wager you quit reading right about the time you set your eyes on that headline. Those of you who've stuck around this long can point yourselves below to see the maniacal creation in action. You won't be disappointed.

Volkswagen considering a four-door, four-seat XL1

According to a report in Autocar, Volkswagen might have more in mind for the XL1 than mining it for advances to grace the next-generation Golf. Aiming to fight the Honda FCEV due for public consumption next year, we're told VW executives have put a four-door, four-seater version of the XL1 - it could be called XL2 - on the drawing board. The impetus is said to come from the top, with VW Group chairman Ferdinand Piëch intent on staying in the deep end of "super-efficent vehicles."
Autocar suspects the necessary changes could raise the weight of the car from 1,749 pounds to 2,068 pounds, which would make it four pounds less than the 2,072-pound Up! we drove a few years ago. Crucially, however, the mag thinks the extra capacity wouldn't change the two-seater's 310-mile-per-gallon rating, with tech tweaks and the aerodynamic benefit of a longer car offsetting the weight. Speculation is that the back seats would be staggered like the fronts in order to maintain the XL1's overall profile.
We recently heard about another XL1 variant that's gone off the radar entirely, the Ducati-engined XLR that we thought we'd see at the Geneva Motor Show and that was said to be going into production, so this one could go the same way. The biggest hurdle to making such an idea a reality, though, could be the price: the current XL1 costs 110,000 euros ($146,116). If VW really is going to compete with the Honda FCEV and the Toyota FCV - $70,000 in Japan - that might be where it wants to start.