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The BMW Z3 2.3 Didn't Have a 2.3-Liter Engine

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author photo by Doug DeMuro February 2018

Here's something you'll probably have trouble believing. In 1999 and 2000, BMW sold a version of its Z3 roadster called the "2.3." This is not, on its face, unusual, but there was one unusual thing about it: it didn't have a 2.3-liter engine. Indeed, the 1999-2000 BMW Z3 2.3 -- which had "2.3" badges on the car, and was officially named the Z3 2.3 -- used a 2.5-liter 6-cylinder engine. This may be the only time a European automaker has ever understated the engine used in one of their vehicles.

To understand how this came about, let's go back to the start of the Z3. The Z3 came out for the 1996 model year, and it initially offered only a 1.9-liter 4-cylinder with a meager 138 horsepower. To placate (lots of) people who said it was underpowered, BMW added a 193-horsepower 2.8-liter 6-cylinder the following year; this model was badged as the Z3 2.8. No big deal.

For the 1999 model year, BMW ditched the 1.9-liter 4-cylinder as the base engine, and instead went to a 170-horsepower 2.5-liter 6-cylinder. So now, the non-M Z3 lineup involved a base model with a 170-hp 2.5-liter 6-cylinder, and a top-end version with the 193-hp 2.8-liter 6-cylinder. This created a little bit of a problem: These engines were close in size and in power, and I assume BMW figured it might be difficult to convince customers to pay extra in order to upgrade just 23 hp and 300 cc of engine size.

And so, I suspect, this is where the "2.3" thing came from: In order to distinguish between the 2.5 and the 2.8, BMW decided to call the 2.5 a "2.3." This created a larger gap between the two models, and it mimicked what was already happening with the 3 Series, which was offered in "323" or "328" guise. There was just one problem, though: While "323" and "328" were just numbers that could've really meant anything, placing a "2.3" badge on the side of a car is a reeealllly good indication that it has a 2.3-liter engine. Which this one didn't. It wasn't an outright lie, but it was a bizarre decision.

Fortunately, this oddity ended quickly. For the 2001 model year, BMW upgraded the top-level engine in the Z3 to a 225-hp 3.0-liter 6-cylinder, dubbed the Z3 3.0, giving the brand freedom to recast the "2.3" as the "2.5" it always was. And so the bizarre 2.5-liter Z3 2.3 only lasted for two model years, 1999 and 2000. But it sure was weird -- and now, every time you look at a Z3 and notice the "2.3" badge, you'll know it's one of the more bizarre mis-badgings in recent automotive history.

Doug DeMuro is an automotive journalist who has written for many online and magazine publications. He once owned a Nissan Cube and a Ferrari 360 Modena. At the same time.

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The BMW Z3 2.3 Didn't Have a 2.3-Liter Engine - Autotrader