The Suzuki Swift Hybrid has been named the UK’s most fuel-efficient petrol car on sale, with a WLTP combined figure of 64.2mpg (3.7 EPA US gallons; rough conversion 53.5 mpg US). The ranking comes from a market-wide review by car shopping platform CarGurus UK, which placed the Swift’s 1.2-litre mild-hybrid powertrain ahead of every other non-electrified or non-self-charging hybrid model currently sold in the country. Suzuki paired the news with a pricing reminder: the Motion grade is available from under £20,000 (~$27,180), and the brand’s 0% APR PCP offer on the Swift Hybrid runs until the end of June 2026.
Highlights
- WLTP combined figure of 64.2mpg for the Swift 1.2 5MT 2WD Motion, the most efficient variant in the range
- Margin of 1.4mpg over second-placed Vauxhall Corsa Hybrid 110 (62.8mpg) in the CarGurus petrol category
- 0% APR PCP financing through 30 June 2026: £237 deposit, 48 monthly payments of £237, optional final payment
- Up to 10 years of Service Activated Warranty coverage when serviced within the Suzuki dealer network
CarGurus Methodology Places Mild Hybrids in Petrol Category
CarGurus UK’s most fuel-efficient cars guide, published 1 May 2026 and authored by contributing editor Ivan Aistrop, rates models by official WLTP combined fuel economy. The platform separates petrol, diesel and hybrid categories, and notably classifies mild-hybrid models alongside conventional petrol cars rather than with full hybrids. CarGurus argues the level of electrical assistance in 48-volt mild-hybrid systems is too limited to qualify as proper hybridisation, since these systems cannot drive the vehicle on electric power alone.
That methodology choice is what places the Swift Hybrid at the top of the petrol ranking rather than in the dedicated hybrid table, where the full-hybrid Mazda 2 (76.3mpg) and Toyota Yaris (67.2mpg) lead. Plug-in hybrids and pure EVs are excluded from the ranking on grounds that their figures are either inflated by laboratory protocol or not measured in mpg at all.
Knapman’s Endorsement
Chris Knapman, Editorial Director at CarGurus UK, said: “Our research shows that the Suzuki Swift is the most fuel-efficient petrol car you can buy in the UK right now, with its mild-hybrid 1.2-litre engine returning an impressive 64.2mpg on the official WLTP cycle. The good news doesn’t stop there: the Swift is also genuinely enjoyable to drive, roomy for a car of its size, and great value too.”
Specification and Powertrain
The 64.2mpg figure applies specifically to the Swift 1.2 with the five-speed manual gearbox in Motion trim. The CVT automatic version of the same powertrain returns a lower 60.1mpg WLTP combined figure, according to manufacturer data. CO2 emissions across the range fall between 99 and 110g/km.
The powertrain pairs a 1.2-litre three-cylinder petrol engine with Suzuki’s 48-volt mild-hybrid system. A 37-litre fuel tank gives a theoretical WLTP range of just over 520 miles per fill on the manual variant.
Finance Terms and Warranty
Suzuki is running a 0% APR Personal Contract Purchase offer on the Swift Hybrid Motion manual through 30 June 2026. The published terms are a £237 (~$322) deposit followed by 48 monthly payments of £237, with an optional final payment to take ownership at the end of the agreement. Zero-deposit and larger-deposit structures are available, with monthly payments adjusted accordingly.
Beyond the standard three-year, 60,000-mile manufacturer warranty, the Swift qualifies for Suzuki’s Service Activated Warranty. The cover renews each time the vehicle receives a qualifying service within the Suzuki dealer network, up to a maximum of 10 years or 100,000 miles.
Competitive Context: A Tight Petrol-Category Race
The Swift’s WLTP-leading position rests on a narrow margin. The Vauxhall Corsa Hybrid 110, also a 48-volt mild-hybrid system but built on Stellantis architecture, returns 62.8mpg — a gap of just 1.4mpg. The Peugeot 208 Hybrid 110, which uses the same Stellantis powertrain, sits a further 0.1mpg behind at 62.7mpg. The Vauxhall Mokka, Alfa Romeo Junior Ibrida and Fiat 600 — all running the same 1.2-litre Stellantis hybrid in higher-output 143bhp form — tie at 58.9mpg.
Real-world figures typically fall short of WLTP claims. Independent long-term testing by Parkers recorded 54mpg from the Swift Hybrid in mixed urban and motorway use, against the 64.2mpg official figure. That 16% gap is consistent with broader industry experience of WLTP-to-real-world divergence on small-displacement mild hybrids.
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