The future is now: The Volkswagen XL1 is a 2-person limited production diesel-powered plug-in hybrid produced by Volkswagen in Wolfsburg, Niedersachsen, Northern Germany. It was designed to be able to travel 100 km on 1 liter of diesel fuel, while being both roadworthy and practical. To achieve such economy, it is produced with lightweight materials, a streamlined body and an engine and transmission designed and tuned for economy. The concept car was modified first in 2009 as the L1 and again in 2011 as the XL1. A limited production of 250 units began by mid 2013; pricing starts at €111,000. The Volkswagen XL1 plug-in diesel-electric hybrid is available only in Europe and its 5.5 kWh lithium-ion battery delivers an all-electric range of 50 km, has a fuel economy of 0.9 l/100 km, and low emission. It was released to retail customers in Germany in June 2014. More: http://en.wikipedia.org/wiki/Volkswagen_1-litre_car
You'll Feel The Power. They'll See The Taillights.