There is no 2007 Honda Civic with a 2.2 CDTI engine. The CDTI badge belongs to Opel/Vauxhall diesels, not Honda. If you meant the European Civic with a 2.2-liter diesel, the engine was typically labeled i-CTDi, and its combined fuel economy sat in the roughly 50–60 miles-per-gallon range in UK measurements, varying by transmission and driving conditions.
Engine naming and availability
To avoid confusion, it helps to know how Honda and other manufacturers label diesels differently. Honda used i-CTDi (later i-DTEC in newer models) for its 2.2-liter diesel in some European Civics, while Opel/Vauxhall used the CDTI designation for its diesel engines. The 2007 Honda Civic did not carry a CDTI badge in any market.
- CDTI is Opel/Vauxhall’s diesel designation, not Honda’s.
- i-CTDi is Honda’s 2.2-liter diesel designation used on some European Civics around that era.
- MPG figures depend on market, transmission, and driving conditions.
With that clarified, the 2.2 i-CTDi version used in 2007 Civics generally delivered competitive fuel economy for a diesel compact, typically in the mid-50s mpg UK on the combined cycle, with variations based on transmission and usage.
Estimated mpg ranges by configuration
- 2.2 i-CTDi with manual transmission (combined): roughly 50–60 mpg UK (about 4.7–5.0 L/100 km).
- 2.2 i-CTDi with automatic transmission (combined): roughly 45–55 mpg UK (about 5.1–6.0 L/100 km).
- Real-world results vary, often dipping below official figures with urban driving and cold starts.
Note that European fuel-economy figures are typically published under the NEDC test cycle, which can be optimistic compared with real-world driving. Actual mileage depends on driving style, maintenance, and vehicle condition.
What this means for buyers or owners today
If you’re researching a 2007 Civic with a diesel engine, confirm the exact engine code (i-CTDi) and review maintenance records, especially related to the turbo and diesel particulate filter. Diesel engines require regular care to maintain efficiency and emissions performance.
Bottom line
Summary
The mislabeling of the engine as “CDTI” for a Honda Civic is common but inaccurate. The Honda 2.2-liter diesel used in some European Civics was the i-CTDi, not CDTI. Real-world mpg generally falls in the 50–60 mpg UK range on combined driving, with some variation based on transmission and usage. For precise numbers, check the original manufacturer’s data for the exact year and trim, or review the car’s own fuel-economy readings.