The short answer
All three platforms make an excellent camper. Choose the ProMaster for the widest, squarest interior and the lowest price of entry; the Transit for the tallest ceiling and the cheapest ownership; the Sprinter for factory 4x4 and the strongest resale. Timber builds kits and conversions for all three, so the chassis never locks you out of the layout you want.
Every conversion starts with the same question, and it is the one people agonize over longest: which van? The honest answer is that the Mercedes Sprinter, Ford Transit, and Ram ProMaster can all become an excellent camper. They get there differently, and the differences matter more to some builds than others.
How do the three platforms compare?
| Sprinter | Transit | ProMaster | |
|---|---|---|---|
| Best for | Rough access roads, resale | Standing height, low running costs | Interior width, budget |
| Factory 4x4 / AWD | Yes | AWD | No — front-wheel drive |
| Interior walls | Tapered | Tapered, curved | Most vertical |
| Crosswise bed fits | Rarely | Rarely | Yes, for most people |
| Engine | Diesel | Gas | Gas |
| Entry price | Highest | Middle | Lowest |
Mercedes Sprinter
The Sprinter is the platform most people picture when they think "camper van," and it earns the reputation. The 144" and 170" wheelbases give you well-understood build dimensions, aftermarket support is enormous, and the available 4x4 and AWD drivetrains are the strongest of the three for genuinely rough access roads.
- Strengths: resale value, drivetrain options, headroom in the high roof, a huge accessory ecosystem.
- Trade-offs: highest purchase price, diesel-only maintenance costs, and a dealer network that thins out in remote areas.
Browse Sprinter-specific components if you have already committed to the platform.
Ford Transit
The Transit has quietly become the value pick for DIY builders. Gas engines keep maintenance simple and cheap anywhere in North America, the high roof is the tallest of the three, and recent AWD models handle forest-service roads better than most people expect.
- Strengths: lowest cost of ownership, tallest interior, easy service anywhere, strong safety tech.
- Trade-offs: wheel wells intrude further into the cargo area, and the curved walls take slightly more planning during cabinetry install.
See what fits at Transit components.
Ram ProMaster
The ProMaster is the sleeper favorite among layout obsessives. Front-wheel drive means the load floor is the lowest and the walls the most vertical of any van sold here, which translates directly into more usable interior width. It is the only platform where a full-width bed fits crosswise for most people — and a crosswise bed buys back a foot and a half of floor length everywhere else.
- Strengths: widest, squarest cargo box; lowest floor height; lowest price of entry.
- Trade-offs: no factory 4x4, lower towing capacity, and front-wheel drive limits deep off-pavement ambitions.
Start from ProMaster components.
What matters more than the badge
After hundreds of kit fitments, our take is that three questions predict satisfaction better than brand loyalty does:
- Where will you actually park it at night? If the answer is trailheads and BLM land, drivetrain matters. If it is campgrounds and driveways, it mostly does not.
- Who is going to service it? Buy the van your nearest competent mechanic can work on. A drivetrain you love and nobody local will touch is a bad trade.
- What does your layout need? A crosswise bed pushes you toward the ProMaster; maximum standing height toward the Transit; resale and 4x4 toward the Sprinter.
The best van is the one that disappears underneath your build — you stop thinking about the chassis the day the interior starts working for you.
The bottom line
Our DIY conversion kits and full conversions are built for all three platforms in both standard and extended wheelbases, so the chassis decision never locks you out of the interior you want. If you are cross-shopping, work backward from the layout rather than forward from the badge.
Frequently asked questions
What is the best van for a camper conversion?
There is no single best van. The Ram ProMaster gives the widest, squarest interior and the lowest entry price; the Ford Transit gives the tallest ceiling and the lowest running costs; the Mercedes Sprinter gives factory 4x4 and the strongest resale value. Choose based on where you will park at night, who will service the van, and whether your layout needs a crosswise bed.
Which van is widest inside for a camper build?
The Ram ProMaster. Its front-wheel-drive layout allows the most vertical walls and the lowest load floor of any van sold in North America, which is why it is the only platform where a full-width bed fits crosswise for most people.
Do I need 4x4 for a camper van?
Most people do not. If you camp at established campgrounds, trailhead parking lots, and driveways, two-wheel drive with good tires covers nearly everything. Factory 4x4 or AWD earns its cost only if you routinely drive unmaintained forest-service and BLM roads in poor conditions.
Does Timber build kits for all three vans?
Yes. Timber conversion kits and full conversions are available for the Mercedes Sprinter, Ford Transit, and Ram ProMaster in both standard and extended wheelbases.