The Smart Roadster Coupé was produced from 2003 to 2006 in four main power variants: the 45 kW Lite, 60 kW standard, 66 kW SB2 Brabus and 74 kW full Brabus. The Coupé body adds a fixed glass rear screen and a hardshell roof section over the standard Roadster’s fabric hood, increasing kerb weight by approximately 35–40 kg.
Understanding exactly which version of the Smart Roadster Coupé you are looking at — or already own — matters more than most buyers realise. The power difference between the base Lite and the full Brabus is substantial, the weight penalty of the Coupé body has real handling consequences, and the equipment levels vary enough to affect both daily usability and long-term ownership costs. This article compares every factory specification across all variants, explains what the numbers mean in practice, and helps you understand how the Coupé sits within the broader 452 family.
Smart Roadster Coupé: The Body That Defines It
The defining characteristic of the smart roadster coupé is its fixed upper structure. Where the standard Roadster uses a fabric soft top that stows manually behind the seats, the Coupé replaces this with a composite hardshell roof, a larger wrap-around rear screen in fixed glass, and a restyled rear deck. The result is a more overtly sporting silhouette — closer in visual language to a miniature GT than an open roadster.
That fixed structure comes with consequences. The Coupé is heavier; Smart quoted kerb weights of around 790 kg for the standard 60 kW Coupé versus roughly 750 kg for the equivalent open Roadster. On a car of this size, 40 kg represents more than 5 per cent of total mass and is felt in corner transitions, particularly on tight, technical roads. The Coupé also loses the option of wind-in-hair motoring, though the fixed roof does reduce wind noise at motorway speeds and eliminates the soft top’s well-documented tendency to leak.
The interior dimensions are identical between the two body styles — the Coupé’s roof does not create additional headroom. What it does create is a more weather-tight, year-round usable cabin, which explains why many buyers in northern Europe and the UK preferred it. For a deeper look at how the two body styles compare dynamically, our analysis of weight, handling and real-world differences between the Coupé and Roadster is the place to start.
Smart Roadster Coupé Specs: The Four Power Variants
All versions share the same 698cc three-cylinder turbocharged engine mounted mid-rear behind the seats, derived from Mitsubishi architecture and managed by a Bosch MEG 1.1 ECU. What differs is the state of tune, the turbocharger boost pressure, and in the case of the Brabus variants, upgraded hardware.
45 kW Lite
The entry-level Lite produces 45 kW (61 PS) and 100 Nm of torque. Boost pressure is limited to 0.89 bar. This version is immediately identifiable by the absence of an oil cooler — a significant omission that makes the engine more vulnerable to heat soak in sustained spirited driving. The Lite was positioned as the cheapest route into Roadster ownership and accounted for a meaningful share of early sales. For current buyers, it is generally the variant to avoid: the oil cooler deletion is a genuine liability, power is modest even by the car’s own standards, and the price premium over a standard 60 kW car rarely justifies the saving.
60 kW Standard
The 60 kW variant (82 PS, 120 Nm) is widely regarded as the sweet spot of the range. Boost rises to 1.09 bar, the oil cooler is fitted as standard, and the car feels meaningfully more alert than the Lite without the additional stress placed on the drivetrain by the Brabus tune. 0–100 km/h takes approximately 10.9 seconds in Coupé form, with a quoted top speed of 175 km/h. This is the variant most commonly seen in the UK and the one smartroadster.tech recommends as the default starting point for buyers.
66 kW SB2 Brabus
The SB2 is the intermediate Brabus offering: 66 kW (90 PS), 130 Nm, boost at 1.33 bar. It uses the same basic engine hardware as the standard 60 kW car but with a recalibrated ECU map and uprated boost. Performance is noticeably sharper, with 0–100 km/h dropping to around 10.0 seconds. This variant is sometimes overlooked because it sits between the more clearly defined standard and full Brabus tiers, but it represents a capable compromise. The higher boost pressure does place additional thermal load on the intercooler, which is worth bearing in mind if you intend to push the car hard — a subject explored in detail in our article on why the intercooler becomes a bottleneck above 1.3 bar.
74 kW Full Brabus
The full Brabus develops 74 kW (101 PS) and 140 Nm at 1.43 bar boost. Smart quoted 0–100 km/h in 9.7 seconds and a top speed of 187 km/h for the Coupé. Beyond the ECU calibration, the Brabus receives a sports exhaust, Brabus-specific alloy wheels, uprated brakes, stiffer suspension settings and distinctive Brabus badging inside and out. Kerb weight is similar to the standard Coupé because the additional hardware is broadly offset by the deletion of some comfort equipment on certain trim levels. For a comprehensive breakdown of everything that distinguishes the Brabus from the standard car, see our detailed guide to every factory Brabus specification and performance figure.
KEY FIGURES
Smart Roadster Coupé: Specification Summary by Variant
All figures are factory-quoted for the Coupé body. Weights are kerb weights. Power figures use metric PS.
- 45 kW Lite — 61 PS / 100 Nm / 0.89 bar boost / no oil cooler
- 60 kW Standard — 82 PS / 120 Nm / 1.09 bar boost / oil cooler fitted
- 66 kW SB2 Brabus — 90 PS / 130 Nm / 1.33 bar boost / uprated ECU map
- 74 kW Full Brabus — 101 PS / 140 Nm / 1.43 bar boost / sports exhaust and uprated brakes
Dimensions, Weight and Smart Roadster Specs in Context
The 452 platform underpins both body styles, so the fundamental dimensions are shared. The Coupé measures 3,427 mm in length, 1,620 mm wide and 1,194 mm tall. The wheelbase is 2,360 mm and the front/rear track is 1,312 mm and 1,320 mm respectively. These are genuinely compact figures — shorter than a Mazda MX-5 and narrower than most modern city cars — which give the car its characteristic agility in urban environments and on narrow B-roads.
Luggage capacity is limited. The front compartment — which is pure luggage space, the engine being mid-rear mounted — offers around 68 litres. There is no meaningful boot behind the engine. Total practical carrying capacity is therefore around 68 litres for soft bags and oddments. The fuel tank holds 33 litres, which at typical consumption of 6.5–7.5 litres per 100 km gives a realistic range of 420–480 km between fills.
The Softouch automated manual gearbox is standard across all variants. Despite its automatic-style paddle and clutchless operation, this is not a conventional automatic: it is a robotised six-speed manual that executes gear changes via electro-hydraulic actuators. Early firmware versions shift slowly enough to feel hesitant; owners with pre-update ECU software will notice a meaningful improvement after the firmware update that reduces gear-change time.
Smart Roadster Coupé Specs: Equipment and Trim Differences
Smart did not publish a straightforward trim hierarchy in the manner of most volume manufacturers. Instead, equipment varied by market, model year and the presence or absence of option packs. However, certain patterns hold consistently across production.
All Coupés received electric windows, central locking, and the characteristic LCD instrument cluster with its distinctive digital speedometer. Air conditioning was a common option rather than standard equipment in most markets. Heated seats, the Brabus steering wheel and carbon-effect trim inserts were available individually or as part of regional packages. Alloy wheels differed between the standard car — typically 15-inch five-spoke items — and the Brabus, which used a specific 15-inch Brabus-design wheel with a different offset.
The Brabus models additionally received a sports suspension package that lowered ride height by approximately 10 mm and stiffened spring rates. This meaningfully changes the handling character: the Brabus Coupé is sharper but less forgiving over poor surfaces. Understanding how suspension geometry affects the 452’s balance is useful context — our piece on the Roadster’s handling balance between understeer and oversteer covers this in detail.
Production Numbers and the Coupé’s Place in 452 History
Smart built approximately 43,000 Roadsters across the full production run, of which a significant but unconfirmed proportion were Coupés. UK registrations totalled around 7,251 across both body styles. Production ran from 2003 to 2006, with the line ending not because of any fundamental product failure but because of Smart’s inability to build the car profitably at realistic volumes — a story covered in depth in our piece on how the 452 became a cult classic despite its commercial failure.
The Coupé was introduced alongside the open Roadster at launch and was never a facelift or later addition. It was presented as the sportier, more GT-oriented interpretation of the same platform. In practice, both body styles developed devoted followings, with Coupé fans emphasising the cleaner roofline and better all-weather usability, and Roadster fans prioritising the lower weight and open-air experience.
One footnote worth noting: the tantalising V6 Brabus prototype was developed on the Coupé body, underlining that Smart and Brabus always saw the closed car as the natural canvas for more extreme performance development, even if that particular project never reached customers.
What These Specs Mean for Buyers Today
The smart roadster coupé specs that matter most when buying a used example today are engine variant, service history, and the condition of components known to deteriorate. The 45 kW Lite’s missing oil cooler is a red flag. The 60 kW standard is the safest choice. The Brabus variants command a premium but deliver it in feel, not just badge value.
From a maintenance perspective, the Coupé’s fixed roof eliminates the soft top as a failure point — one of the more common and expensive issues on open Roadsters. However, the Coupé is not immune to water ingress through the door seals and windscreen surround; our guide to finding and fixing water leaks applies equally to both body styles. Tyre choice and correct pressures are also disproportionately important on a car this light — the wrong rubber degrades the handling noticeably, and the correct tyre pressures and wheel torque settings are worth checking before every season.
The smart roadster coupé represents one of the most characterful small sports cars ever built in Europe. Its specifications, read in isolation, seem modest — but in context, they tell the story of a car engineered to a coherent and deliberate brief: lightweight, agile, turbocharged, and genuinely fun. Every variant from Lite to full Brabus honours that brief in its own way, and knowing exactly which one you are dealing with is the foundation of confident ownership.
Frequently Asked Questions
What is the kerb weight of the Smart Roadster Coupé?
The standard 60 kW Smart Roadster Coupé weighs approximately 790 kg at kerb. The open Roadster equivalent is around 750 kg. The Brabus Coupé is broadly similar to the standard Coupé, as the additional performance hardware is offset by different specification choices across trim levels.
How many variants of the Smart Roadster Coupé were produced?
Four main power variants were produced: the 45 kW Lite, 60 kW standard, 66 kW SB2 Brabus and 74 kW full Brabus. All use the same 698cc three-cylinder turbocharged engine in the mid-rear position, differentiated by boost pressure, ECU calibration and, in Brabus models, additional hardware upgrades.
Is the Smart Roadster Coupé the same as the Roadster-Coupé?
Yes. Smart’s official designation was «Roadster-Coupé» to distinguish it from the open Roadster. Both terms refer to the same closed-roof variant of the 452. In common usage, enthusiasts and the press shortened this to simply «Coupé», and both names refer to the same car throughout production from 2003 to 2006.
Which Smart Roadster Coupé variant should I buy?
The 60 kW standard Coupé is the recommended starting point: it has the oil cooler the Lite lacks, proven reliability, and sufficient performance for enjoyable driving. The full Brabus is worth the premium if you find a well-maintained example. Avoid the 45 kW Lite unless the price is exceptional and you drive it gently.
