Autech Stelvio AZ1: The Bizarre Italian-Japanese Nissan

The Autech Stelvio AZ1 is one of the strangest, rarest, and most fascinating Japanese cars ever produced. Built between 1989 and 1991 by Autech, a Nissan subsidiary that specialized in low-volume special vehicles, the Stelvio was designed by Italian automotive stylist Ercole Spada (famous for his work on Aston Martins and the Zagato Junior Z). Only 202 were ever built. It combines Italian coachbuilt styling with Japanese mechanicals — specifically, the twin-turbo VG30DETT from the Nissan 300ZX Z32. The result is a car that looks like nothing else and drives like nothing else.

The Italian Connection

Nissan contracted Autech to build a limited-edition coupe that would showcase Italian design with Japanese engineering. They hired Ercole Spada, who had previously worked on the Aston Martin DB4 GT Zagato, the Alfa Romeo Giulia TZ, and various other coachbuilt exotics. Spada's brief was to create a distinctive, luxury coupe with Italian proportions but Japanese practicality.

The result, the Stelvio AZ1, has a body that's more Italian than Japanese — unusual fender humps, asymmetric design touches, and a deliberately unconventional profile. Some observers called it "ugly." Others called it "bold." There was no middle ground.

The Mechanical Foundation

Under the Italian-designed body was entirely Japanese:

• Engine: Nissan VG30DETT 3.0L twin-turbo V6 (same as the 300ZX Z32 Turbo)
• Output: 280 PS at 6,400 rpm (Japanese gentleman's limit)
• Transmission: 5-speed manual or 4-speed automatic
• Drivetrain: Rear-wheel-drive
• Chassis: Nissan 300ZX Z32 platform

The engineering was standard Nissan of the era. The novelty was the body.

Production and Rarity

Autech built just 202 Stelvio AZ1s between 1989 and 1991. Of those:

• Z (base): 167 units
• Vente de luxe: 35 units (luxury-focused)

The Stelvio was sold exclusively in Japan through Nissan's Prince dealer network. It was extremely expensive for its era — priced similar to the 300ZX Z32 Twin Turbo despite its low production volume.

Cultural Legacy

The Stelvio AZ1 has become a cult object in certain corners of the JDM community. Its combination of low production, distinctive styling, and VG30DETT power makes it a conversation piece rather than a collector car. JDM enthusiasts who know the Stelvio almost always have strong opinions about it.

Today's Market

Clean Autech Stelvio AZ1 examples are extremely rare. When one does appear for sale in Japan, prices typically range from ¥8,000,000 to ¥15,000,000 ($50,000-$100,000). Import into the US is eligible starting in 2014-2016 (depending on build date), though few have made the journey.

Legacy

The Autech Stelvio AZ1 is the strange footnote in Nissan's 1990s history — a car that probably shouldn't have been built, but was, and that left behind only 202 examples as proof of the experiment. For enthusiasts who appreciate automotive oddities, the Stelvio is irresistible. For everyone else, it's simply forgotten.

For JDM collectors, owning a Stelvio is a statement: "I care about the weird, the obscure, and the experimental." It's not a car you buy to impress investors — it's a car you buy to preserve a footnote in automotive history.