The Opel Karl Rocks 1.0 ECOTEC (73 Hp) Start/Stop is a subcompact hatchback produced by the German automaker Opel between January 2018 and June 2019. Positioned as an entry-level variant within the Karl Rocks range, it offered a more rugged aesthetic and slightly increased ground clearance compared to the standard Karl. This model was primarily aimed at the European market, offering an affordable and practical city car option. It falls within the broader Karl generation, internally designated as the 6th generation of the Agila/Karl lineage, and shares its platform with the Vauxhall Viva Rocks in the United Kingdom.
Technical Specifications
| Brand | Opel |
| Model | Karl |
| Generation | Karl Rocks |
| Type (Engine) | 1.0 ECOTEC (73 Hp) Start/Stop |
| Start of production | January, 2018 |
| End of production | June, 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 5.9 l/100 km (39.9 US mpg, 47.9 UK mpg, 16.9 km/l) |
| Fuel consumption (extra urban) | 4.6 l/100 km (51.1 US mpg, 61.4 UK mpg, 21.7 km/l) |
| Fuel consumption (combined) | 5.1 l/100 km (46.1 US mpg, 55.4 UK mpg, 19.6 km/l) |
| CO2 emissions | 116 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 14 sec |
| Acceleration 0 – 62 mph | 14 sec |
| Acceleration 0 – 60 mph | 13.3 sec |
| Maximum speed | 168 km/h (104.39 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 12.9 kg/Hp, 77.7 Hp/tonne |
| Weight-to-torque ratio | 9.9 kg/Nm, 101.2 Nm/tonne |
| Power | 73 Hp @ 6500 rpm |
| Power per litre | 73.1 Hp/l |
| Torque | 95 Nm @ 4500 rpm (70.07 lb.-ft. @ 4500 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | D10XE |
| Engine displacement | 999 cm3 (60.96 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 74 mm (2.91 in.) |
| Piston Stroke | 77.4 mm (3.05 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 3.5 l (3.7 US qt | 3.08 UK qt) |
| Coolant capacity | 4.2 l (4.44 US qt | 3.7 UK qt) |
| Kerb Weight | 939 kg (2070.14 lbs.) |
| Max. weight | 1353 kg (2982.85 lbs.) |
| Max load | 414 kg (912.71 lbs.) |
| Trunk (boot) space – minimum | 206 l (7.27 cu. ft.) |
| Trunk (boot) space – maximum | 1013 l (35.77 cu. ft.) |
| Fuel tank capacity | 32 l (8.45 US gal | 7.04 UK gal) |
| Length | 3676 mm (144.72 in.) |
| Width | 1632 mm (64.25 in.) |
| Width with mirrors folded | 1698 mm (66.85 in.) |
| Width including mirrors | 1876 mm (73.86 in.) |
| Height | 1532 mm (60.31 in.) |
| Wheelbase | 2385 mm (93.9 in.) |
| Front track | 1396 mm (54.96 in.) |
| Rear (Back) track | 1404 mm (55.28 in.) |
| Minimum turning circle | 10.6 m (34.78 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 5 |
| Gearbox type | Manual transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Drum |
| Tires size | 165/65 R14; 185/55 R15; 195/45 R16 |
| Wheel rims size | 14; 15; 16 |
Powertrain & Engine Architecture
The Karl Rocks 1.0 ECOTEC utilizes the D10XE engine code, a 999cc three-cylinder petrol engine. This engine is part of Opel’s ‘ECOTEC’ family, designed with a focus on fuel efficiency. It employs a naturally aspirated configuration with multi-point fuel injection and four valves per cylinder. The engine’s relatively small displacement and three-cylinder layout contribute to its lower weight and reduced internal friction. The 73 horsepower output is achieved at 6500 rpm, while peak torque of 95 Nm (70.07 lb-ft) is delivered at 4500 rpm. The engine is paired with a five-speed manual transmission, providing a straightforward and relatively economical driving experience. The Start/Stop system, standard on this variant, further enhances fuel economy by automatically shutting off the engine when the vehicle is stationary.
Driving Characteristics
The 1.0-liter engine and five-speed manual transmission combination in the Karl Rocks results in a driving experience geared towards urban practicality rather than outright performance. Acceleration from 0-100 km/h takes approximately 14 seconds, and top speed is limited to 168 km/h (104.39 mph). The gear ratios are tuned for fuel efficiency, meaning the engine needs to be revved to access its power. Compared to potential higher-output versions (which weren’t offered on the Rocks trim), this variant prioritizes economy and ease of driving over spirited acceleration. The light clutch and relatively short gear lever make it easy to operate in city traffic. The raised suspension of the Rocks trim provides a slightly more comfortable ride over uneven surfaces compared to the standard Karl.
Equipment & Trim Levels
The Karl Rocks 1.0 ECOTEC (73 Hp) Start/Stop typically included a base level of equipment, focusing on essential features. Standard equipment generally included air conditioning, power steering, ABS brakes, electronic stability control, and a basic audio system with USB connectivity. The “Rocks” trim added distinctive exterior styling elements such as rugged body cladding, roof rails, and a slightly raised ride height. Interior upholstery was typically cloth, with a functional and durable design. Optional extras could include alloy wheels, a touchscreen infotainment system, and parking sensors.
Chassis & Braking
The Karl Rocks utilizes a MacPherson strut front suspension and a torsion beam rear suspension. The front brakes are ventilated discs, providing adequate stopping power for the vehicle’s weight and performance. However, the rear brakes are drums, a cost-saving measure common in this segment. The electric power steering provides light and easy steering, making it ideal for maneuvering in tight spaces. The suspension is tuned for comfort, prioritizing ride quality over sporty handling. The raised ride height of the Rocks trim provides slightly improved ground clearance for navigating rougher roads.
Market Reception & Comparison
The Opel Karl Rocks 1.0 ECOTEC (73 Hp) Start/Stop was generally well-received as an affordable and practical city car. Critics praised its fuel efficiency and low running costs, but noted its limited performance. Compared to other trims in the Karl lineup, this variant offered the best balance of price and economy. It competed with other subcompact hatchbacks such as the Hyundai i10, Kia Picanto, and Fiat 500. The manual transmission was favored by many for its simplicity and fuel efficiency, although an automatic transmission was available as an option on some markets.
Legacy
The D10XE engine, while not known for exceptional performance, has proven to be relatively reliable. Common issues are generally minor and related to routine maintenance items. On the used car market, the Karl Rocks 1.0 ECOTEC (73 Hp) Start/Stop represents a budget-friendly option for those seeking a small, economical hatchback. Its simple mechanicals and readily available parts contribute to its affordability and ease of maintenance. While not a collector’s item, it remains a practical and functional vehicle for everyday use.
