The Smart Roadster Coupé is approximately 20–25 kg heavier than the open Roadster due to its fixed glass rear section and structural reinforcements, yet both share the same 698cc turbocharged mid-rear engine and chassis. The Coupé offers greater rigidity, marginally better refinement and more usable luggage space; the open Roadster delivers a purer, lighter driving experience.
When Smart launched the 452-series in 2003, it offered two distinct body styles beneath the same swooping skin: the open Roadster with its folding fabric roof, and the Roadster Coupé with its distinctive fixed glass fastback tail. At first glance the differences look cosmetic, but dig deeper and you find genuine engineering distinctions that affect how each car feels on the road, how it ages, and how much it costs to keep. Whether you are hunting for your first smart roadster coupe or weighing up a switch from the open car, this guide gives you the full picture across weight, torsional stiffness, handling character, daily usability and long-term ownership.
What Exactly Is the Smart Roadster Coupé?
The smart roadster coupe shares the open Roadster’s tridion safety cell, front luggage compartment and mid-rear 698cc three-cylinder turbo engine, but adds a fixed glassfibre-reinforced composite upper structure behind the seats, culminating in a large curved rear screen. This is not a traditional hardtop bolted onto a convertible: the Coupé was engineered as a separate body variant from the outset, with additional cross-bracing baked into the structure. The result is a car that looks like a miniature sports GT rather than a roadster with the roof up.
Smart produced the Coupé alongside the open car from 2003 until production ended in 2006. Both variants were available in the same trim hierarchy: the 45 kW Lite, the 60 kW standard, the 66 kW SB2 Brabus and the 74 kW full Brabus. The Coupé was never sold as a Brabus Edition in all markets, so availability of the higher-output versions varies by country and is worth checking when buying.
Confusingly, Smart also sold a Roadster with a removable hardtop, which is neither the open car nor the Coupé — it is an open Roadster with a separately purchased or optioned hardtop accessory. If you want clarity on that distinction, our guide to choosing between a hardtop and soft-top on the open Roadster explains the trade-offs in detail.
Smart Roadster Coupé Weight vs Open Roadster: The Numbers
Kerb weight matters enormously in a car that produces between 45 kW and 74 kW. Every kilogram you shed improves acceleration, braking and — crucially in a car with near-50:50 weight distribution — cornering balance. Smart’s official figures put the open Roadster at around 790 kg kerb weight for the 60 kW variant. The smart roadster coupe comes in at approximately 810–815 kg in the same specification, a penalty of 20–25 kg attributable to the fixed rear glasswork, additional body structure and associated sealing.
In absolute terms that difference is small. Over a quarter-mile sprint or a fast motorway run it is imperceptible. Where it registers is in the most demanding cornering scenarios: the open Roadster has a fractionally quicker turn-in response and feels the more agile of the two around a technical circuit or a tight mountain road. The difference is subtle enough that most drivers would never notice it in ordinary back-road use.
Weight Distribution and Centre of Gravity
Both cars position the engine behind the seats and ahead of the rear axle — a true mid-rear layout. The Coupé’s extra mass sits high in the tail, raising the centre of gravity by a small but measurable amount. In practice this contributes to the Coupé feeling very slightly more planted at low speed but fractionally less eager to rotate at the limit. Neither characteristic is dramatic; both cars are fundamentally neutral handlers that reward smooth inputs.
Smart Roadster Coupé Handling: How It Differs on the Road
The most significant dynamic difference between the two cars is not weight but torsional stiffness. The Coupé’s fixed roof adds meaningful rigidity to the upper structure, which reduces scuttle shake over rough surfaces and gives the suspension geometry a more consistent platform to work against. On smooth roads the two cars feel almost identical; on broken British tarmac the Coupé’s body moves less, which translates to better wheel contact and marginally more predictable mid-corner behaviour.
The open Roadster compensates with that intangible sense of connection that only a convertible provides — wind noise, exhaust sound and the sensation of speed are all amplified. Neither car understeers excessively in standard trim; both can be encouraged into gentle oversteer on a trailing throttle. For a detailed analysis of how the mid-rear layout creates this balance, the deep-dive into the Roadster’s understeer and oversteer characteristics is essential reading.
Impact of Suspension Setup on Both Variants
Because the Coupé is stiffer, it responds more predictably to suspension modifications. Lowering springs or coilovers communicate more directly through a rigid body, meaning changes to ride height and spring rate translate into more consistent corner-entry behaviour. The open Roadster, with its slightly more flexible structure, can mask small suspension changes beneath chassis flex. If you are planning any suspension work, our comparison of lowering springs and coilovers covers the practical options for both body styles.
Practicality and Daily Usability
The smart roadster coupe genuinely offers more usable space than the open car. The fixed rear section creates an enclosed luggage area behind the seats that, while still small by any normal measure, is significantly larger and more weatherproof than the open Roadster’s exposed parcel shelf. You can leave a jacket, a laptop bag or a weekend’s worth of light luggage back there without worrying about a shower.
Both cars have the same front luggage compartment — accessed via the bonnet — which holds roughly 65 litres. Bear in mind that this is the only engine-free end of the car; the mid-rear engine sits behind the seats, so the front compartment is pure storage space. The Coupé’s rear area adds a practical supplement that genuinely changes how usable the car is as an everyday driver.
Refinement also favours the Coupé. The fixed glass rear screen blocks a considerable amount of wind turbulence and road noise at motorway speeds. The open Roadster with its fabric roof up is reasonably refined, but at 70 mph the Coupé is noticeably quieter — an important factor if you use the car on longer journeys rather than purely for weekend blasts.
Known Issues: Are There Variant-Specific Problems?
Both cars share the same fundamental weaknesses: the Softouch automated gearbox requires careful maintenance, the SAM unit is prone to water ingress faults (B1xxx codes), the LCD instrument cluster can fade, and steering rack wear is common on higher-mileage examples. None of these are body-variant specific.
The open Roadster does have one additional vulnerability: the fabric roof and its seals. Leaks around the hood are among the most common complaints from open Roadster owners, and left unaddressed they accelerate corrosion of the sill and floor panels. The Coupé sidesteps this problem entirely — its fixed structure has no fabric seal to perish. If you are buying an open Roadster, inspecting the roof seals and the sills beneath them is non-negotiable. Our guide to fitting a roof seal kit explains what to look for and how to address any issues you find.
The Coupé’s large rear glass panel is its own potential liability. Replacement units are increasingly rare, and cracks or delamination are expensive to address. Always inspect the rear screen carefully for crazing, discolouration or seal deterioration before buying.
Smart Roadster Coupé: Which Variant Should You Buy?
The smart roadster coupe is the better choice if you want a daily driver, value refinement, plan longer journeys, or simply prefer the GT coupé aesthetic over the roadster silhouette. Its additional structural rigidity also makes it the stronger platform if you ever plan suspension modifications. The open Roadster wins if top-down motoring is your priority, if you prize the last degree of dynamic agility, and if you are prepared to stay on top of roof seal maintenance.
On the engine variant question, the advice is the same for both body styles: avoid the 45 kW Lite, which lacks an oil cooler and is consequently at greater risk of oil degradation under hard use. The 60 kW standard is the sweet spot for road use; the 66 kW SB2 Brabus and 74 kW full Brabus add genuine performance but command a premium and are harder to find in good condition. For a broader competitive context, our comparison of the Smart Roadster against the Mazda MX-5 puts both body styles in perspective against a key rival.
Prices in 2025 remain remarkably accessible. Good Coupés typically command a slight premium over equivalent open Roadsters — perhaps £500–£1,500 — reflecting the practicality advantage and lower roof-related maintenance costs. If you need help identifying where to find genuine low-mileage survivors, our guide to the best sources for buying a Smart Roadster covers dealers, auctions and private sales in detail.
Frequently Asked Questions
How much heavier is the Smart Roadster Coupé than the open Roadster?
The smart roadster coupe is approximately 20–25 kg heavier than the equivalent open Roadster, depending on specification. This is primarily due to the fixed composite rear section and additional structural bracing. The weight penalty is small enough to have negligible impact in normal road driving.
Does the Smart Roadster Coupé have a proper boot?
The Coupé has an enclosed luggage area behind the seats created by its fixed glassfibre rear section, supplemented by the standard front compartment of approximately 65 litres. It is modest by any normal standard, but meaningfully more practical and weatherproof than the open Roadster’s exposed parcel shelf.
Is the Smart Roadster Coupé better for everyday use?
Yes, for most buyers the Coupé is the more practical everyday choice. Its fixed roof eliminates fabric seal maintenance, reduces wind and road noise at motorway speeds, and provides an enclosed rear luggage area. The trade-off is the absence of open-air motoring and a fractionally higher kerb weight.
Are there any Coupé-specific mechanical problems to watch for?
The Coupé shares all the standard 452 known issues — SAM faults, Softouch maintenance, steering rack wear and cluster fade. Its unique vulnerability is the large rear glass panel, which is increasingly difficult to source as a replacement. Always inspect it carefully for cracks, crazing and seal condition before purchasing.
