The BMW M635 CSi (E24) occupies a specific place in the M-car lineage: a grand touring coupe powered by the same 3.5-litre M88/3 inline-six that drove the M1 supercar, producing approximately 286 hp and 340 Nm of torque. Otto-Mobile has captured a widebody-modified example of this 1984–1989 machine in resin at 1:18, finished in Metallic Blue, under the Coutner conversion designation.
BMW M635 CSi: M1 Engine in a Grand Touring Shell
Built on the E24 sixth-generation 6 Series platform, the M635 CSi ran from 1984 to 1989. Its defining feature was the M88/3 engine, a 3.5-litre inline-six shared with the BMW M1 and producing around 286 hp (DIN) and 340 Nm of torque. The E24 was a substantial coupe that positioned BMW at the top of the European grand touring class throughout the mid-1980s. No equivalent M-badged coupe existed in the BMW range during those years.
The Coutner Widebody: Reshaping the E24 Silhouette
The Coutner widebody conversion works extensively on the standard E24 body, adding prominent fender flares and revised lower bodywork that significantly broaden the car's stance beyond factory dimensions. Where the stock M635 CSi already carries a purposeful profile, the Coutner modification gives the coupe a custom presence closer in visual weight to a period touring car competitor than a production road car. The Metallic Blue finish on this particular example emphasises the sculpted panel work introduced by the conversion, catching light differently across the extended bodywork surfaces.
Otto-Mobile Resin Construction at 1:18
Otto-Mobile, whose catalogue reference for this release was issued in 2021, produces this model in resin at 1:18. Resin construction allows for sharper panel-line definition and greater paint depth on metallic finishes than conventional die-cast methods, both important qualities when reproducing the flared bodywork and Metallic Blue livery of this widebody E24. Otto-Mobile's resin 1:18 releases have historically appeared in relatively short runs, and this Coutner widebody variant represents a subject not widely replicated at this scale.
Placing the Model in a Collection
The E24 M635 CSi in Coutner widebody form sits naturally alongside other M-lineage subjects: the BMW M1 (E26) that shares the M88 engine family makes an obvious companion, as does a standard-body E24 release to show the extent of the conversion. The model's broad stance also pairs well with other Otto-Mobile custom and tuning builds. For collectors focused on 1980s European performance road cars or on the wider custom and restomod culture that has grown around the E24 platform, this Metallic Blue resin piece stands out on the shelf.
Frequently asked questions
Does the model have opening parts?
This is a resin model by Otto-Mobile. Resin construction typically means a sealed, one-piece body without opening doors, bonnet or boot. The detail is concentrated on the exterior surfaces: the widebody fender flares, lower bodywork extensions, and the Metallic Blue paint finish.
What is the model made of and who makes it?
The model is produced by Otto-Mobile in resin. Resin allows for finer surface detail and deeper metallic paint reproduction compared to die-cast zinc alloy, making it a common choice among specialist manufacturers for custom and tuning subjects.
What is the connection between the M635 CSi and the BMW M1?
Both cars use the M88-family inline-six engine. The M635 CSi's specific unit, the M88/3, is a direct development of the engine used in the M1 supercar, producing approximately 286 hp (DIN) and 340 Nm in the E24 application. The M635 CSi was the fastest BMW road car available during its 1984–1989 production run.
