Vulcar

Vulcar is a Swedish automotive manufacturer in the HD Universe.

Overview
Vulcar is most likely the GTA analogue of Volvo, as the Vulcar Ingot is noticeably based on the 90's Volvo 850 and V70 wagons.

Other clues that lead Vulcar to be based on the Swedish Manufacturer, as in GTA V a pedestrian can be heard talking on a cell phone about "How safe Vulcars are", which may be a reference to well known Volvo safety standards. Which is also mentioned at the Southernsanandreassuperautos.com website: "Reputed as the safest car ever made, (...) has been the choice for really terrible drivers for 20 years", which states that its closest counterpart in age is the Volvo 850. The font used in their branding is also similar to that of Volvo.

Their name appears to be a play-on of "vulgar", (meaning gross and inappropriate) and "car". This could be another reference to Volvo as their name is similar to the word "Vulva", the outer part of the female genitalia.

Trivia

 * Vulcar was originally thought to be the in-game variant of Volkswagen, as the Ingot also had similarities to the VW Passat B4 Wagon, but BF seems to take the Volkswagen role.
 * Vulcar is also the name of a volcanic planet located within the Vulcar system of the Mid Rim in Star Wars. Volvo's emblem also boasts a planet symbol, Mars.
 * The Warrener takes up slight resemblance to a Volvo 240, despite its description implying that the Warrener has a Swedish style to it, though the Warrener overall resembles as the 1969 Nissan Skyline GT-R.
 * The Liberator shows up as a Vulcar in some pre-race menus, when it is actually a Vapid. This was right after the update came out, it might be fixed by now.

Navigation
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