Editing Volkswagen Golf (section)

===Golf Variant Twin Drive===
As part of the "Fleet study in electric mobility" project that began in 2008, VW developed the Golf Variant twinDRIVE [[plug-in hybrid electric vehicle]], and built twenty examples for research. These vehicles have an [[all-electric range]] of {{cvt|57|km|mi|0}} and the [[internal combustion engine]] provides for a total range of {{cvt|900|km|mi}}. The plug-in hybrid drive of the Golf Variant twinDRIVE is equipped with either an 11.2&nbsp;[[kWh]] or a 13.2&nbsp;kWh [[lithium-ion battery]] pack, as Volkswagen is testing packs from two vendors. Ten vehicles are equipped with batteries from the American-German manufacturer GAIA with [[cathode]] type nickel cobalt aluminium dioxide (NCA). The other ten is powered by lithium-ion batteries with [[Lithium-ion battery#High power cathode using lithium nickel manganese cobalt (NMC)|nickel manganese cobalt]] (NMC) cathodes from the Korean-German joint venture SB LiMotive ([[Samsung]] and [[Robert Bosch GmbH|Bosch]]). These 10 vehicles have been in use since early 2011. Both battery systems offer high power and energy density. They each weigh about {{cvt|150|kg|lb}}. The [[gasoline engine]] is used to support the electric heating system when outdoor temperatures are low.<ref name=GCC0611>{{cite web|url=http://www.greencarcongress.com/2011/06/vw-20110629.html|title=Volkswagen presents status of fleet study in electromobility; latest generation of twïnDRIVE plug-in hybrid|publisher=Green Car Congress|date=29 June 2011|access-date=30 June 2011}}</ref>

Using guidelines for determining the fuel consumption of plug-in hybrids, VW estimated a fuel consumption of 2.1&nbsp;L/100&nbsp;km (112&nbsp;mpg US), which is equivalent to 49&nbsp;g/km CO<sub>2</sub>. When the battery is fully charged, the Golf Variant twinDRIVE is designed to maximize the share of pure electrical energy used for driving, and only when longer distances are driven does the share of supplemental gasoline fuel increase. Top speed of the car is {{cvt|170|km/h|mph|0}} and it accelerates to 100&nbsp;km/h (62&nbsp;mph) in under 12&nbsp;seconds. When operated in pure electric mode, the Golf Variant twinDRIVE can reach a top speed of {{cvt|120|km/h|mph|0}}.<ref name=GCC0611/>

The production version was expected to be based on Mk6 Golf featuring a 1.5&nbsp;L turbodiesel engine and electric motor, with estimated arrival date of 2015.<ref>{{cite web |last=Vijayenthiran |first=Viknesh |url=http://www.motorauthority.com/volkswagen-twin-drive-plug-in-hybrids-not-due-until-2015.html |title=VW Twin Drive plug-in hybrids not due until 2015 |publisher=Motorauthority.com |date=4 September 2008 |access-date=15 October 2010 |archive-url=https://web.archive.org/web/20090427113614/http://www.motorauthority.com/volkswagen-twin-drive-plug-in-hybrids-not-due-until-2015.html |archive-date=27 April 2009 |url-status=dead }}</ref> A [[SEAT León]] prototype with the Twin Drive system was also under development.{{citation needed|date=February 2014}}