K4 vs GR Corolla
In the compact car class, the K4 and the GR Corolla are natural rivals. It’s a balanced fight with different weapons. The K4 relies on fuel economy & range, the GR Corolla on engine & performance.
At a glance
- Engine & Performance GR Corolla wins
- Fuel Economy & Range K4 wins
- Space & Practicality Tie
- Off-road & Towing GR Corolla wins
- Safety & Tech K4 wins
- Engine & Performance0.0
- Fuel Economy & Range5.9
- Engine & Performance9.1
- Fuel Economy & Range1.4
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
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The GR Corolla has 153 hp more power
Put simply, the GR Corolla is far ahead here: 300 hp compared with 147 hp. The GR Corolla’s extra output gives it more in reserve when you need to get up to speed.
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The K4 has better fuel economy
The K4’s 34 mpg leaves the GR Corolla’s 24 mpg well behind, so if this spec matters to you, the choice is easy. The K4 uses less fuel on the standard combined cycle, which matters most if you drive a lot.
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The GR Corolla has 163 lb-ft more torque
Not a close call. The GR Corolla lists 295 lb-ft and the K4 lists 132 lb-ft. That’s a substantial gap. More torque means stronger pulling from low speeds, which you feel when accelerating from a stop or climbing grades.
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The K4 has a 12.2 in longer body
A difference, but not a ranking: 185.8 in for the K4, 173.6 in for the GR Corolla. Neither is better in general; it’s a trade-off between space inside and ease of parking.
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The K4 has a bigger 12.3 in touchscreen
Among all the differences on this page, 12.3 in against 8 in is one of the most meaningful, and it favors the K4. Screen size isn’t everything (physical controls and software speed matter too), but bigger is easier to read.
Design & Size
The K4 is the larger car of the two, while the GR Corolla is the more compact choice.
Dimensions
| Spec | K4 | GR Corolla |
|---|---|---|
| Length | 185.8 in | 173.6 in |
| Width (no mirrors) | N/A (not specified) | 72.8 in |
| Height | N/A (not specified) | 58.2 in |
| Wheelbase | 107.1 in | 103.9 in |
Engine & Performance
GR Corolla leads
The GR Corolla clearly takes the engine & performance round. The GR Corolla makes its case with 153 hp more power. Power is only part of the story; weight, gearing and torque delivery shape how quick a car feels. If engine & performance is your priority, the GR Corolla is the car to pick.
Total system output
K4: 147 hp GR Corolla: 300 hp More power helps with merging, overtaking and climbing hills, especially with passengers and luggage on board.
Torque
K4: 132 lb-ft GR Corolla: 295 lb-ft The GR Corolla’s extra torque makes it more relaxed when fully loaded or towing.
Fuel Economy & Range
K4 leads
If fuel economy & range is high on your list, the K4 makes the stronger case by a wide margin. The K4 adds better fuel economy. Official figures rarely match real-world driving exactly, but the ranking between two cars tends to hold. That makes the K4 the natural choice for buyers focused on fuel economy & range.
Fuel economy (combined)
K4: 34 mpg GR Corolla: 24 mpg Better combined fuel economy lowers your running costs every week, and the savings add up over years of ownership.
Fuel economy (city)
K4: 30 mpg GR Corolla: 21 mpg In town, driving style has a big effect, but the K4 starts from a better baseline.
Space & Practicality
Too close to call
The space & practicality specs are close enough that neither gets the point. This section won’t settle the choice, so weigh the other areas more heavily.
Off-road & Towing
GR Corolla leads
Slight edge to the GR Corolla on off-road & towing. Most buyers could live happily with either. The GR Corolla answers with available all-wheel drive. All-wheel drive helps you get going on slippery roads, but good tires matter just as much for stopping and turning. So if off-road & towing tops your list, lean toward the GR Corolla.
AWD / 4WD available
K4: no GR Corolla: yes Available all-wheel drive improves traction in rain, snow and on loose surfaces.
Safety & Tech
K4 leads
The K4 takes safety & tech by a nose. The K4 has the edge with a bigger 12.3 in touchscreen. A bigger touchscreen makes maps and phone mirroring easier to read at a glance. The takeaway: on safety & tech, the K4 is the stronger car.
Largest touchscreen
K4: 12.3 in GR Corolla: 8 in The K4’s larger display gives navigation and menus more room.
Full Specifications
Engine & Performance
| Spec | K4 | GR Corolla |
|---|---|---|
| Powertrain | Gas | Gas |
| Engine | 2.0L I4 | 1.6L turbo I3 |
| Total system output | 147 hp | 300 hp (winner) |
| Torque | 132 lb-ft | 295 lb-ft (winner) |
| Transmission | IVT (CVT) | 6-speed manual (8-speed automatic available) |
| Drivetrain | FWD | AWD (GR-FOUR) |
Fuel Economy & Range
| Spec | K4 | GR Corolla |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 34 mpg (winner) | 24 mpg |
| Fuel economy (city) | 30 mpg (winner) | 21 mpg |
| Fuel economy (highway) | 40 mpg (winner) | 28 mpg |
| Fuel tank | N/A (not specified) | 13.2 gal |
Space & Practicality
| Spec | K4 | GR Corolla |
|---|---|---|
| Seats | 5 seats | 5 seats |
| Cargo (behind rear seats) | N/A (not specified) | 17.8 cu ft |
Off-road & Towing
| Spec | K4 | GR Corolla |
|---|---|---|
| AWD / 4WD available | No | Yes (winner) |
Safety & Tech
| Spec | K4 | GR Corolla |
|---|---|---|
| Largest touchscreen | 12.3 in (winner) Biggest touchscreen | 8 in Smallest touchscreen |
| Driver-assist suite | Kia Drive Wise | N/A (not specified) |
| Basic warranty | 5 yr / 60,000 mi | 3 yr / 36,000 mi |
Dimensions
| Spec | K4 | GR Corolla |
|---|---|---|
| Length | 185.8 in | 173.6 in |
| Width (no mirrors) | N/A (not specified) | 72.8 in |
| Height | N/A (not specified) | 58.2 in |
| Wheelbase | 107.1 in | 103.9 in |
Price
| Spec | K4 | GR Corolla |
|---|---|---|
| Starting MSRP | N/A (not specified) | $40,520 |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Which One Should You Buy?
Choose the K4 if…
- you want better combined fuel economy (34 mpg vs 24 mpg)
- you rely on navigation and phone mirroring on a larger display (12.3 in vs 8 in)
- you mostly drive in town (30 mpg vs 21 mpg in the city)
- you want better highway fuel economy (40 mpg vs 28 mpg)
Choose the GR Corolla if…
- you merge, overtake or climb hills with a full load (300 hp vs 147 hp)
- you want more pulling power from low speeds (295 lb-ft vs 132 lb-ft of torque)
- you face snow, ice or slippery back roads
Also Compared
Frequently Asked Questions
Which is better for most people, the K4 or the GR Corolla?
The K4 and the GR Corolla split the comparison (fuel economy & range for the K4, engine & performance for the GR Corolla), so pick the strength you’ll use.
Which is larger, the K4 or the GR Corolla?
The GR Corolla is actually the more compact one. It measures 173.6 × 72.8 × 58.2 in, while the K4 comes in at 185.8 in.
Executive Summary
Two companies, two answers to the same question. That’s how I see the K4 from Kia and the GR Corolla from Toyota. My main argument for the K4? It comes with better fuel economy. It also helps that the K4 has a bigger 12.3 in touchscreen. The GR Corolla does have a strong card to play: 153 hp more power.
Put simply, the K4 suits people who care about fuel economy & range, while the GR Corolla suits people who put engine & performance first.
My pick: the K4 if fuel economy & range is a daily concern, otherwise the GR Corolla for its engine & performance.
Personal opinion based on the data above. Your priorities may differ.