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The Z4 E85 / E86
GEN01 and GEN01F
The First Z4. Some Say the Last Pure One.
The E85 is where the Z4 story begins. It replaced the Z3 in 2002 with a longer wheelbase, a stiffer chassis, and a silhouette that most people weren’t quite sure about at first glance. That roadster silhouette, created by a Danish designer named Anders Warming in the space of about a year, has aged into something distinct and revolutionary.
This is the generation never manipulated with a turbo. Every engine in the E85/E86 range breathes naturally, revs freely, and sounds the way inline-sixes are supposed to sound. The Z4 M, which came later with the 2006 facelift, borrowed the S54 straight-six directly from the E46 M3 and is considered by many to be one of the finest driver's cars BMW has ever built.
While this is widely considered to be a single generation of Z4s, the introduction of proper M-division cars, a coupe body style, and other changes warrant special attention, something Zigmoidal calls the 01F (facelift) generation. Nevertheless, the E85/E86 still gets talked about as the benchmark for what a Z4 should feel like.
E85 Roadster
The E85 is the car that launched the Z4 nameplate. Introduced at the 2002 Paris Motor Show, it went on sale in North America by November of that year as a 2003 model. The roadster was the only body style available for the first three years of production. It wears a traditional fabric soft top, with a removable hardtop available as an option for buyers who wanted greater flexibility year-round.
The soft top mechanism is manual on the pre-facelift cars and power-assisted on the facelift. The body is low and wide, with a 98.2-inch wheelbase that's longer than the Z3's, and a stance that sits the driver noticeably closer to the road. Trunk space was modest, but considered a plus for small, convertible sports car. Run-flat tires were standard, which eliminated the need for a spare, freeing up that space entirely. Many modern drivers have replaced the run-flats for a softer ride.
E86 Coupe
The coupe arrived later, and it tells a different story.
BMW showed the E86 concept at the 2005 Frankfurt Motor Show. The production version debuted at the New York Auto Show in April 2006 and went on sale in late May of that year, three years into the E85's run. Tomasz Sycha designed the coupe so it wasn’t just the E85 with a roof on it. It was conceived and executed as its own thing, though it shares many parts with the E85.
The fixed roof brings a structural benefit that's difficult to overstate. Torsional rigidity on the E86 is more than double the roadster's. For a driver who cares about turn-in precision and chassis feel, this is the only argument needed to justify the coupe, even though the aesthetics, drag, and other factors tell a broader story.
The roof itself has a double-bubble contour — a nod to classic racing cars, and a practical solution that provides more headroom than the roadster with the soft top raised. The rear glass flows into a fastback that terminates in an integrated spoiler, shaped to generate downforce at speed. Trunk space grows to 10.1 cubic feet over the roadster's 8.5, thanks to the hatch design.
The trim levels for the coupe is deliberately narrow: 3.0si and Z4 M only. There's no entry-level E86, no four-cylinder option, no 2.5i. BMW positioned the coupe as a driver's car from the start, and the trim lineup reflects that. In its first thirteen months on sale, roadsters outsold the coupe at a ratio of seven to one. But by the end of production, just 17,094 coupes had been built worldwide — compared to 180,856 roadsters. The coupe was always the rarer car, and still is.
