Datsun 240Z Buyer's Guide

The Datsun 240Z is the car that changed how Americans thought about Japanese performance. Launched in 1969 for the 1970 model year at a sticker price of $3,526, it offered Jaguar E-Type styling, BMW 2002 driving dynamics, and Toyota reliability — for half the price of any of them. Today, clean original 240Zs sell for sums that would have shocked enthusiasts ten years ago, and the supply of unrestored survivors continues to shrink.

What Made the 240Z Important

When the 240Z arrived in American showrooms in late 1969, the affordable sports car market was dominated by aging British roadsters — MGB, Triumph TR6, Spitfire — that were charming but unreliable. The 240Z offered a fundamentally different proposition: modern engineering, six-cylinder smoothness, four-wheel independent suspension, and Japanese build quality at a price competitive with the British cars and dramatically below the Italians and Germans.

Year-by-Year Differences

1970 (Series I)

The original year. Distinguishing features include the early-style instrument cluster with separate gauges, the chrome window surround trim, and "240Z" badging on the rear hatch in a specific font that changed in later years. Series I cars are the most collectible and command 10-15% premium over equivalent later cars.

1971-1972

Refined production. The 1971 model added the optional five-speed manual (rare in the US — most cars are four-speeds). 1972 brought minor trim changes. These years offer the best balance of original character and refined drivability.

1973

The end of the original 240Z. Federal emissions and bumper regulations changed the front bumper height in mid-year, and the L24 engine got revised cam timing and ignition for emissions compliance. 1973 cars lose a few horsepower compared to earlier cars but are otherwise identical in driving feel.

The Engine: L24 Inline-Six

The 2.4-liter L24 inline-six is one of the most overlooked engineering achievements of its era. It was designed for the 240Z but went on to power successful Datsun and Nissan cars for decades. The basic block design appeared in trucks and other models well into the 1980s.

What makes the L24 special isn't peak output — it's the linear, smooth power delivery. The engine pulls cleanly from 1,500 rpm to redline with no flat spots, no peaky cam, no surge. It's the kind of engine that feels at home both at 35 mph in city traffic and at 6,000 rpm on a mountain road.

"I bought my 1972 240Z in 2014 because I wanted to understand the appeal beyond the obvious styling. After ten years of driving and rebuilding it, I'm convinced the L24 is the most honest-feeling six-cylinder I've ever experienced. It rewards smooth inputs, punishes ham-fisted driving, and never asks for more than basic mechanical attention. That's a kind of engineering integrity that's increasingly rare."

— Emily Chen

What Goes Wrong

Rust Is the Killer

The 240Z's unibody construction means rust isn't a cosmetic issue — it's structural. The rear strut towers, the floor pans, the rocker panels, the rear quarters where they meet the wheel arches, and the rear hatch frame are all critical areas. Rust in these zones is expensive to repair properly because the unibody requires careful welding and panel alignment.

Electrical Gremlins

Forty-five-year-old wiring is forty-five-year-old wiring. Original harnesses commonly fail at the dashboard cluster ground, the headlight relay system, and the tail light circuit. Budget for at least a partial harness replacement and a new fuse box on any 240Z you buy.

Carb Tuning

The original twin SUs (or Hitachi sidedrafts) work brilliantly when tuned correctly and frustratingly when neglected. Most surviving 240Zs need a carb rebuild and synchronization to run their best. A specialist will charge $800-$1,500 for a proper rebuild and tune; the difference in driving experience is night-and-day.

Buying Strategy

The strongest strategy in the current 240Z market is to find a documented, rust-free survivor in the $35,000-$55,000 range and own it as a long-term holding. These cars have appreciated steadily for over a decade and the supply of clean originals continues to shrink.

Project-grade cars (rough but complete) at $12,000-$22,000 are tempting but require honest math. A proper restoration runs $45,000-$85,000, putting you at $60,000-$110,000 all-in for a car worth $50,000-$80,000 finished. Restoration economics work only if you genuinely want the build experience and the specific car.

The smart-money entry point in the broader Z-car family is actually the 280Z (1975-1978). Federal regulations made these cars heavier and slower than the 240Z, but they got fuel injection (much better drivability), better brakes, and updated safety equipment. Clean 280Zs trade for $15,000-$28,000 — a fraction of equivalent 240Z money for a comparable driving experience and similar collector trajectory.

What to Look For

Pre-Purchase Checklist

1. Inspect rear strut towers
   Critical structural rust area. Open rear hatch, remove spare-tire cover, examine inner wheel wells with flashlight. Rust here = walk away.
2. Pull carpet, check floor pans
   Both driver and passenger sides. Floor pans rot from underneath. Patch panels welded over original rust = future failure.
3. Squeeze rocker panels firmly
   Should be rigid. Flex = rotted out and structural compromise. Major repair if damaged.
4. Verify VIN matches numbers
   Dashboard HLS30 plate, engine bay tag, engine block stamping (behind distributor). All four must match for matching-numbers claim.
5. Compression test all six cylinders
   Should read 145-165 PSI uniformly. Variance >15% between cylinders = head gasket or ring problem.
6. Listen for timing chain rattle
   Cold start rattle is normal (tensioner). Constant rattle through driving = chain stretch, requires replacement.
7. Check carburetor synchronization
   SUs should be balanced and tuned. Check throttle response, idle smoothness, off-idle pickup.
8. Test all electrical functions
   Headlights, tail lights, gauges, turn signals, fuel gauge, wipers, hatch latch. Multiple failures = harness replacement coming.
9. Examine rear differential
   R180 differential. Check for whining noise on deceleration, broken stub axles, leaking pinion seal.
10. Document with HD photos
    Every panel, frame, undercarriage, engine bay, interior, and identifying tag/stamp. Build the case before you wire money.

Common Issues

Pricing Guide

Fun Facts