One of the things that makes the BMW E30 so endlessly interesting is its range. BMW didn't build one E30 — it built a whole family, from frugal carbureted four-cylinders to a homologated race weapon. If you're shopping, building, or just deep in an internet rabbit hole, this guide breaks down the key models, engines, and specs so you know exactly what's what.
A quick note before we start: the E30 was sold across many markets over a 12-year run, so exact figures varied by year and region. The numbers below reflect typical European specifications and are a reliable guide to what each model is about.
The engine families
Almost every E30 uses one of a handful of engine families, and knowing them is the fastest way to understand the car:
- M10 — the older 1.8-liter four-cylinder, used in early entry models. Tough and simple.
- M40 / M42 — newer four-cylinders introduced later in the run. The M42 in the 318is is a gem: a 16-valve twin-cam four that loves to rev.
- M20 — the "small six," BMW's smooth straight-six in 2.0, 2.3, and 2.5-liter forms. The soul of the E30 range.
- M21 — the diesel six, in naturally aspirated and turbocharged versions.
- S14 — the motorsport-derived 2.3-liter four-cylinder built specifically for the M3. A different animal entirely.
The four-cylinder models
316 / 316i — The entry point. Early 316 cars used a 1.8-liter M10 with a carburetor producing around 90 horsepower; the 316i added fuel injection. These are modest performers, but light and honest, and the later 316i with the M40 engine made a slightly different power figure. Best thought of as a cruiser rather than a corner-carver.
318i — The four-cylinder volume seller. Early cars used the fuel-injected M10 making around 105 horsepower; later cars moved to the M40. Reliable, economical, and a great basis for a build.
318is — The enthusiast's four-cylinder. Powered by the 16-valve M42 making around 134 horsepower, the 318is is light over the nose, eager, and rev-happy. Many enthusiasts love it for its balance — it doesn't have the weight of the six up front, so it changes direction beautifully. Late 318is models are genuinely in demand today.
The six-cylinder models
This is where the E30 finds its signature character. The M20 straight-six is smooth, torquey, and endlessly charming.
320i — A 2.0-liter M20 producing around 125 horsepower. The smallest six, and a sweet, free-revving thing.
323i — An early six-cylinder hero with a 2.3-liter M20 making roughly 139 horsepower. Discontinued in 1985 when the 325i arrived.
325i / 325is — The one most enthusiasts want. A 2.5-liter M20 making about 167 horsepower and 164 lb-ft of torque. It's the best balance of performance, smoothness, and usability in the standard range, and the "is" trim adds sportier touches. If someone says "the perfect E30," they're usually picturing a 325is.
325e — The efficiency-focused "eta" model. The 2.7-liter "eta" M20 was tuned for low-rpm torque and economy rather than outright power, redlining early. Smooth and relaxed, but not the sporty choice. Dropped at the 1987 facelift.
325iX — The unusual all-wheel-drive E30. It pairs the 325i's six with a full-time AWD system, making it a sought-after curiosity today, especially in snowy regions.
The diesels
324d / 324td — Powered by the M21 six-cylinder diesel, naturally aspirated in the 324d and turbocharged in the 324td. These prioritized economy and torque over speed and are relatively rare in enthusiast circles, but they're a charming, durable footnote in the E30 story.
The legend: E30 M3
The M3 deserves its own column. It shares the E30 silhouette but almost every panel is different — flared arches, a raised boot lid for aerodynamics, unique glass angles, and serious bodywork changes to make it race-legal.
Key M3 specs:
- Engine: S14 2.3-liter (2,302 cc) inline-four, twin-cam, 16-valve
- Power: 200 horsepower at 6,750 rpm in the original European version, with later Evolution models climbing to around 215–238 horsepower
- Character: high-revving, motorsport-derived, with an intake and exhaust note unlike any other E30
- Purpose: built to homologate BMW's Group A touring car racer
BMW built roughly 17,970 E30 M3s in total, including limited Evolution variants (Evo I, Evo II, and the 2.5-liter Sport Evolution) made in small numbers to keep the race car competitive. Those special editions are now among the most valuable BMWs of the era.
Weight and why it matters
A huge part of the E30's appeal is mass — or the lack of it. Depending on model and equipment, most E30s weigh somewhere in the region of 1,100 to 1,300 kg (roughly 2,400 to 2,900 lb). That's featherweight by modern standards, where comparable sedans can weigh 50% more. Low weight is why even a modestly powered E30 feels alive: less mass to stop, turn, and accelerate means more feedback and more fun per horsepower.
Which E30 should you care about?
It depends on what you want:
- Best all-rounder: 325i / 325is — the classic six-cylinder experience.
- Best lightweight handler: 318is — the 16-valve four that loves corners.
- Best budget entry: 318i — simple, cheap, and a great project base.
- Best quirk: 325iX — all-wheel drive rarity.
- Best investment / icon: E30 M3 — the motorsport legend, priced accordingly.
Know the specs, wear the badge
Half the fun of the E30 is knowing this stuff cold — being the person at the meet who can tell an M20 from an M42 by ear. If that's you, we make t-shirts for exactly your kind of nerd-pride. [Shop our BMW E30 Tee]
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