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Chevrolet Sonic RS and Hyundai i20 Ultimate arrive at the buyer with just one thousand reais difference, only starting to diverge when someone checks the Inmetro fuel consumption, discovering that each excels in a different driving cycle.
The survey, published by Autoesporte on September 9, 2026, compares the two top-of-the-line versions of a segment ranging from compact hatchbacks to entry-level SUVs.
The Hyundai i20 Ultimate retails at R$ 139,990, while the Chevrolet Sonic RS is priced at R$ 140,990, figures collected in September 2026 from the Official 0 km Market Store.
A difference of R$ 1,000 in this price range is negligible. No buyer will choose between the two based on this, which shifts the focus to other specifications.
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Both deliver 115 hp, but the Chevrolet reaches its peak a thousand rpm earlier
The declared power is identical: 115 hp with ethanol or gasoline in both models. What changes is the rpm range in which this power is produced, which impacts daily driving.
The Sonic RS peaks at 5,000 rpm, while the i20 Ultimate reaches that figure only at 6,000 rpm. Thus, the Chevrolet performs more comfortably at lower traffic speeds.
Torque reinforces this reading. The Sonic rates at 18.9 kgfm with ethanol and 18.3 kgfm with gasoline, compared to 17.5 kgfm from the i20, giving the Chevrolet a torque advantage of up to 1.4 kgfm.
In practical terms, higher torque at lower rpm means less need to shift gears uphill with a full load. This is a characteristic that the driver will notice before checking the specs sheet.
Inmetro fuel consumption separates the two by half a kilometer per liter in each cycle
With ethanol in the city, the i20 records 8.8 km/l while the Sonic RS achieves 8.4 km/l. Therefore, the urban advantage goes to Hyundai, by a margin of 0.4 km/l.
On the highway with ethanol, the situation reverses: the Sonic rates at 10.4 km/l against the i20’s 10.1 km/l. The Chevrolet recovers exactly where the competitor previously had the edge.
With gasoline, the pattern repeats. In the city, the i20 logs 12.6 km/l while the Sonic registers 12.1 km/l; on the highway, the Sonic rises to 14.8 km/l compared to the rival’s 14.3 km/l.
In other words, the difference is half a kilometer per liter in each cycle, alternating the winner based on the route taken. There is no more economical car here; it’s about choosing the right car.
City drivers and highway users are likely to choose different cars in this competition
If most of the mileage is urban, the i20 Ultimate has the edge in both fuel types. The margin is small, but it adds up over an entire year.
If the predominant use is on highways, the advantage goes to the Sonic RS in both fuel types as well. Moreover, the higher torque at lower rpm aids in carrying loads on acceleration.
This explains why the comparison doesn’t point to a clear winner. With prices tied and fuel consumption varying based on the cycle, the decision ultimately comes down to the driver’s profile.
However, this clarity only appears for those who know how many kilometers they drive in the city and how many on the highway each month. Without this data, the choice becomes a toss-up between equals.
The Sonic’s trunk holds 46 liters more than the Hyundai’s
The Sonic RS’s trunk has a capacity of 392 liters, while the i20 Ultimate’s trunk is 346 liters. The 46-liter difference is equivalent to an additional carry-on suitcase.
For those who travel frequently or transport work equipment, this extra space is a significant factor in decision-making, especially since it doesn’t impact the price or urban fuel consumption.
The ground clearance also favors the Chevrolet, with 20 cm compared to the Hyundai’s 16.5 cm. These 3.5 cm can make a difference when navigating over high bumps or unpaved roads.
Meanwhile, the i20 maintains its design for a lower ride height, which often provides benefits in terms of stability and handling feel on asphalt curves.
Acceleration comparisons require careful reading
The Sonic RS recorded 10 seconds from 0 to 100 km/h in an instrumental test reported by Autoesporte. The i20 Ultimate shows 11.7 seconds, but that figure is from the manufacturer.
These measurements come from different sources, and this distinction needs to be clear. Comparing track results with catalog information does not yield a reliable difference of 1.7 seconds between the two.
Therefore, the honest interpretation is that the Sonic has a verified performance of 10 seconds, while the i20’s figure still awaits confirmation using the same testing methodology.
The complete comparison, including price assessments and item lists for each version, can be found in the report published by Autoesporte in September 2026.
The Sonic sold 2,651 units in August, highlighting the competitive landscape
The total of 2,651 units registered in August 2026 underscores the Brazilian market’s interest in this intermediate category between compact hatchbacks and entry-level SUVs.
This segment has grown because it caters to those seeking a higher driving position and family space without having to invest in a fully equipped sports utility vehicle.
The published material does not provide maintenance costs or service prices for either model. Anyone looking to include these factors should consult the manufacturers’ tables.
The tiebreaker is in the usage cycle, neither price nor power
With both models producing 115 hp, separated by a mere R$1,000 (about US$180) in price and alternating consumption of half a kilometer per liter, there is little room to choose solely based on technical specifications.
It is hard not to see a technical tie that shifts the decision to each driver’s habits. City driving favors the i20; highway use, luggage capacity, and ground clearance favor the Sonic.
The key metric is the mileage the owner drives in a typical month
Thus, the practical advice is to note urban and highway mileage for a month before heading to the dealership to decide between the two top-tier models.
This personal number is worth more than any catalog comparison, because it is what turns half a kilometer per liter into real savings at the end of twelve months.
Two equivalent cars on paper require a decision that only the owner can make
On the other hand, those without a defined routine between city and highway might look at the 392 liters of trunk space and the 20 cm of headroom as criteria.
These two items don’t change with fuel type or route, thus providing consistent advantages for the Sonic RS in any usage profile the buyer may have.
Would you choose based on the urban consumption of the i20 or the trunk space and highway performance of the Sonic RS?
