3-Speed Manual without the Covet being made in 1965 is a bit wrong. Plus the existing base Covet engine (1.5 Inline-4 SOHC with Carburetor) is just fine for the car. The 1.3 Inline-4 you're talking about has ITBs while the 550cc Inline-3 was designed for a car half the weight of the Covet and is just too powerless for moving the Covet in a decent manner. No back seats means we're talking about a cargo version (after all, cargo versions of 3-door Hatchbacks were offered once) and that also means rear panels instead of rear windows. Only the absence of the hubcaps passes.
The Fiat Panda also uses the TwinAir, and it's not that far from the size of the Covet, plus it makes 85 hp which is more than the 1.5 DX It could be passed off as a prototype ultra-eco engine that didn't quite work out due to technological limitations
The Fiat 500 (and the Panda and the mk3 Lancia Ypsilon for that matter - all 3 of them were based on the same chassis) had the 875cc TwinAir Inline-2 from ~2010 to ~2016. In its turbocharged versions, it made 85 and 105hp, while it made 65hp in its only NA version. The Ypsilon was the heaviest of the 3 cars (at about 1.1 tonnes), the others weighed about a tonne, more or less. With that said, a modern European city car with a Turbocharged Inline-2 could definitely enter the BeamNG lore.
The problem with an I2 is no sound samples for it, as cool as it would be it most likely won't happen
The devs can add new samples. Like they did for the vivace when it came out. But with that being said. I don't think traces of some placeholder items ingame is always a great indicator for what is to come in the next update.
well you can make and I2 engine in Automation when it gets released as a dlc and use the exported sample on any car --- Post updated --- I think they are trying to move away from that kind of sample based approach
aight, i found somthing a while ago that was pretty exciting but im deciding to share it now, i dont know if it has been mentioned in the past however when i was poking around in the game files i found early art and missions for campaign mode under the directory: (your drive here)/steamapps\common\BeamNG.drive\campaigns (this is just one example but in the campaign there are multiple races, cutscenes, partly completed comics,etc. basicly confirms new or remasterd map/maps and humans some stuff i found (there is tons more):