One very minor concern I have with the Harvester is access for maintenance. I perform my own basic service on my vehicles and am curious to know how easy it will be to service based on the vague references to placement.
2 best Harvester Range extender ideas I have both are VW group engines:
1. (Fun Option, Suggested Before I just like the idea)- Base 2.0L 4cyl boxer turbo or N/A from Porsche 718 Cayman/Boxer-
>Pros- Plenty of power, sounds great for a 4cyl so it might be enjoyable to hear it turn on in range extender form, not as tall so can possibly fit flat under the scout like in the render where the extender may go.
>Cons- Likely too Expensive, Will probably require premium fuel unless re-tuned but would then make less power.
2. (Realistic Option/Most likely)- 2.0L 4cyl N/A from different VW models
>Pros- Likely more reliable from not having turbos, can take regular fuel, more affordable.
>Cons- Taller layout so may be harder to fit in original range extender location, less powerful
Bonus idea: Turbo 2.0L 4cyl from Golf GTI or Golf R (Shares pros and cons from the first 2 options)
>Pros-Good power, decent sound, Mid-priced between the other two options
>Cons- premium fuel, engine size may be an issue
As much as I like Option 1 and the Bonus option I like being able to use regular fuel and not premium so that is what I would probably pick unless the other engines were reworked to make a little less power, but run on regular 87 octane.