1967 Alfa Romeo 1600 Spider Duetto, original twin-cam car with a very early bid

Why we picked it

The 1600 Duetto is the original round-tail Alfa Spider, and it is the one collectors want. The seller says this car (chassis AR663890, built in 1966 and titled as a 1967) keeps its original 1.6-liter twin-cam with twin Webers and its 5-speed. The non-original parts the seller lists are the steering wheel, the shift knob and an electronic ignition. It is ivory over black with a black soft top. It is registered in New York and shows 34,600 miles, which the listing marks TMU (true mileage unknown).

The current bid is $1,700 with 10 days left, so it will go much higher. Original 1600 Spiders sold for $24,640 to $51,500 this year. If bidding stalls in the low-to-mid $20,000s, it is still a solid entry into the most desirable Spider series.

The value check

The current bid is $25,000. Comparable cars in the same condition have sold for $24,640–$51,500, so the middle of the market is about $38,070. That put this car 34% under. Bids usually climb in the final hours, so the discount will likely shrink.

Original-condition 1967 Spider 1600 (Duetto) sales in 2026 ran $24,640 to $51,500, with a $34,000 high bid not meeting reserve. The $1,700 bid is a 10-day-out opening bid and will climb; reserve status is not stated.

Where the numbers come from:

• 1967 Spider 1600 sold $27,100 (Aug 2026)
• 1967 Spider 1600 sold $51,500 (Jul 2026)
• 1967 Spider 1600 sold $24,640 (May 2026)
• classic.com Spider Series 1 market

What to check

• Rust in the sills, floors, the trunk floor and the lower front fenders behind the wheels. The listing does not mention rust, so ask for underside photos.
• The fuel gauge does not work (a MeterMatch module is included), and the vent-window latches and reverse light are loose items in the car.
• Mileage is TMU (true mileage unknown). Check the chassis and engine numbers against the Alfa registry for a 1966 build.
• Check the 2nd-gear synchro and the rear axle for noise, and ask for a compression and leak-down test on the twin-cam.
• The listing does not state the reserve or say whether the car currently runs and drives.

Making it drive like new

Keep the twin-cam and Webers, and add a modern rebuilt alternator, an electronic fuel pump with a regulator, and better-quality coilovers or uprated springs and Konis. Ventilated front disc upgrades and inertia-reel belts make it a more usable tour car without hurting value, as long as the original parts are kept.