Buy an NSU Ro80 only after a specialist compression test on each rotor chamber. The Wankel engine's tip seals decide the budget, and rust in the sills, chassis legs and suspension mounts can make an otherwise charming car a parts donor.
For this November 5, 2026 guide I read Classic & Sports Car: NSU Ro80 buyer's guide and Octane: NSU Ro80 buying guide. The mechanical cautions below come from those pages; the order of checks and the questions for the seller are my practical recommendations. Any price examples in those sources are market snapshots, not a valuation of the car in front of you. So, compare it with recent sales of the same specification and condition.
Get the chambers measured, not described
Classic & Sports Car calls a professional compression check vital and says it should be done by a rotary specialist. Each rotor has three chambers, and the magazine says all should exceed 7 bar with no more than 0.5 bar variation. Octane agrees the only way to know the engine is healthy is to measure every chamber. A seller saying it pulls fine is not a reading. Book the test before you talk numbers.
Try the idle-and-steering check
The C&SC guide describes a simple test: idle should sit around 1,200 rpm, and with the car held on the brake in first gear, turning the steering lock to lock should not stall it. A stall suggests a weak engine. The same guide describes a brief full-throttle check on the brake, where revs well outside 2,000 to 2,200 rpm can point to a slipping clutch or a tired engine. Leave that one to the inspector, with the car safely positioned. Write down what you saw either way.
Watch temperature and coolant closely
C&SC warns that the O-ring water seals on each side of the engine casing can fail, causing leaks and overheating. It says the temperature gauge should stay on the thin white line in normal driving, and Octane also flags overheating as a warning sign. Check the coolant level cold and look for leaks after the drive. Ask how often oil and coolant were changed. An overheated rotary can need far more than a hose.
Inspect the structure and seals
Octane lists sills, wheelarches, front valance, chassis legs and all suspension mounting points as rust areas. C&SC adds that 1974 and 1975 cars rust more than others and that damp from leaking screens can ruin trim and rot floors. Look for leaks around both screens, and check the windscreen is the correct dual-curvature type. Get the car on a lift for the chassis legs and mounts.
Test the semi-automatic gearbox
The Ro80 uses a three-speed semi-automatic with a vacuum-operated clutch triggered by a microswitch in the gear lever. C&SC says gear selection should be easy and take-up smooth, and that adjustment fixes most problems, though a squealing gearbox needs an overhaul or replacement. Keep your hand off the lever unless you are changing gear. Note any slipping or harsh engagement on the drive.
Decide what you think about conversions
Both magazines say engine conversions, such as Ford V4 or Mazda rotary swaps, are less desirable. C&SC says swapping back can make sense if the rest of the car merits it. Octane's 2024 price bands of roughly 2,500 to 10,000 pounds or more are UK figures, not U.S. values. Price a converted car as a different proposition, and confirm which engine the title paperwork describes.
Prove the identity before a deposit
Match the chassis number on the Ro80 to the title, any import papers and the plate on the car before you order a history report. Our VIN verification guide walks through that match, and imported-car report coverage sets expectations for cars that spent years overseas. Older chassis numbers may sit outside modern report databases, so confirm coverage before paying. NMVTIS covers U.S. title history only; it cannot replace foreign records or a physical inspection.
Get the repair scope in writing first
If any chamber reads low or the car stalls on the steering test, treat the engine as a rebuild until a rotary specialist says otherwise. Look, a seller PDF or a folder of photos is a starting document, not independent proof of condition. Ask the inspector for written findings with local estimates, split into safety work and cosmetic wishes. The NYC consumer-agency used-car guidance tells buyers to have an independent mechanic check the car, and our pre-purchase inspection checklist helps you set the scope.
We are a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck or Experian. Guest reports have been about $5.50, member reports about $4.50 and a two-report bundle about $6.75; confirm the price at checkout because it can change. A report can miss unreported work, so keep the inspection appointment even when the history looks quiet.
Comments (0)
No comments yet. Be the first to share your thoughts!
Log in to leave a comment.