Volkswagen e-Golf & e-up!
The world's most aerodynamic car in production today, the Volkswagen XL1, will influence the next-generation VW Golf (due in 2019) in several key way.
According to Autocar, the XL1 will lend its aero expertise to the Golf:
"Work has started on a package of aerodynamic innovations for the next generation of Volkswagen Golf, according to company sources."
"It is understood that VW will be using the lessons learnt from the radical two-seat XL1, which makes extensive use of aerodynamic innovation to help it achieve 313mpg."
VW's goal with the next-gen Golf is reportedly to make it the most fuel-efficient mass-produced mainstream vehicle the brand has ever offered. To accomplish that, VW will focus intensively on aerodynamics:
"According to a VW insider, “a number of aerodynamic solutions are being investigated ”. However, according to the source, a fundamental difficulty facing the engineers and designers is that, proportionately, the Golf is quite a short car."
Aside from aero, Volkswagen is reportedly looking into advancements such as variable compression ratio, flywheel hybrid systems, transmission decoupling and electric turbochargers.
However, the easiest way to achieve VW's goal of supreme efficiency with the Golf is to drop those stand-alone ICE engines in favor of only PHEV and BEV. But this is Volkswagen (lovers of diesel), so it's unlikely that will happen. However, we can be reasonably certain that VW will continue to offer the Golf in PHEV and BEV versions when the next-gen model debuts in 2019.