Metro Turbograv (Apocalypse)
A high powered road vehicle engine for standard sized road vehicles.
Source: X-COM Apocalypse Ufopedia
Larger and more powerful than the Metro Roadgrav, the Metro Turbograv is the only road vehicle engine that does not come as standard on any vehicle. There is little reason for X-COM to use it, however, as it is too large for a Blazer Turbo Bike, while the Stormdog can be fitted with the more powerful Metro Powergrav.