K4 vs Sentra
If you’re shopping for a car in the compact car class, the K4 and the Sentra are likely both on your shortlist. You won’t find a dramatic mismatch here: the K4 and the Sentra are close on nearly every line that counts.
At a glance
- Engine & Performance Sentra wins
- Fuel Economy & Range Tie
- Space & Practicality Tie
- Off-road & Towing Tie
- Engine & Performance0.0
- Fuel Economy & Range5.9
- Engine & Performance0.4
- Fuel Economy & Range5.9
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
-
The Sentra has 14 lb-ft more torque
It’s a fine margin, and it favors the Sentra (146 lb-ft versus 132 lb-ft). More torque means stronger pulling from low speeds, which you feel when accelerating from a stop or climbing grades.
Design & Size
Neither is the “big one” here; the K4 and the Sentra are matched on size.
Dimensions
| Spec | K4 | Sentra |
|---|---|---|
| Length | 185.8 in | 182.9 in |
| Width (no mirrors) | N/A (not specified) | 71.5 in |
| Height | N/A (not specified) | 56.9 in |
| Wheelbase | 107.1 in | 106.6 in |
| Curb weight (from) | N/A (not specified) | 3,036 lb |
Engine & Performance
Sentra leads
The Sentra squeezes out a win in the engine & performance section. The Sentra comes with 14 lb-ft more torque. The Sentra’s extra torque makes it more relaxed when fully loaded or towing. If this section decides it for you, choose the Sentra.
Torque
K4: 132 lb-ft Sentra: 146 lb-ft Electrified powertrains deliver torque instantly, so compare torque figures alongside the powertrain type.
Fuel Economy & Range
Too close to call
Call the fuel economy & range round a draw. If fuel economy & range was going to be your tiebreaker, you’ll need a different one.
Space & Practicality
Too close to call
There’s little to choose between them when it comes to space & practicality. Both cover space & practicality well enough that other priorities should break the tie.
Off-road & Towing
Too close to call
Side by side, the off-road & towing figures for the K4 and the Sentra barely differ. Net result on off-road & towing: level.
Safety & Tech
Nothing to tally in the safety & tech section, but plenty to read. The table lists what the K4 and the Sentra each use.
Full Specifications
Engine & Performance
| Spec | K4 | Sentra |
|---|---|---|
| Powertrain | Gas | Gas |
| Engine | 2.0L I4 | 2.0L I4 |
| Total system output | 147 hp | 149 hp |
| Torque | 132 lb-ft | 146 lb-ft (winner) |
| Transmission | IVT (CVT) | CVT (Xtronic) |
| Drivetrain | FWD | FWD |
Fuel Economy & Range
| Spec | K4 | Sentra |
|---|---|---|
| Fuel economy (combined)EPA estimate where available | 34 mpg | 34 mpg |
| Fuel economy (city) | 30 mpg | 30 mpg |
| Fuel economy (highway) | 40 mpg | 40 mpg |
| Fuel tank | N/A (not specified) | 12.4 gal |
Space & Practicality
| Spec | K4 | Sentra |
|---|---|---|
| Seats | 5 seats | 5 seats |
| Cargo (behind rear seats) | N/A (not specified) | 14.3 cu ft |
| Rear legroom | N/A (not specified) | 34.90 in |
Off-road & Towing
| Spec | K4 | Sentra |
|---|---|---|
| AWD / 4WD available | No | No |
Safety & Tech
| Spec | K4 | Sentra |
|---|---|---|
| Largest touchscreen | 12.3 in Biggest touchscreen | N/A (not specified) |
| Driver-assist suite | Kia Drive Wise | Nissan Safety Shield 360 |
| Basic warranty | 5 yr / 60,000 mi | 3 yr / 36,000 mi |
Dimensions
| Spec | K4 | Sentra |
|---|---|---|
| Length | 185.8 in | 182.9 in |
| Width (no mirrors) | N/A (not specified) | 71.5 in |
| Height | N/A (not specified) | 56.9 in |
| Wheelbase | 107.1 in | 106.6 in |
| Curb weight (from) | N/A (not specified) | 3,036 lb |
“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 Sentra if…
- you want more pulling power from low speeds (146 lb-ft vs 132 lb-ft of torque)
- you already know your way around Nissan’s products
Also Compared
Frequently Asked Questions
Which is better for most people, the K4 or the Sentra?
On the specs compared here, the Sentra makes more sense for most buyers; the K4 doesn’t win a single measurable area.
Is the K4 bigger than the Sentra?
The K4 and the Sentra are so close in size that you’d struggle to tell them apart on dimensions alone.
Executive Summary
On paper, the K4 and the Sentra chase the same buyer. In the details, Kia and Nissan made different calls. My main argument for the Sentra? It comes with 14 lb-ft more torque.
Put simply, the K4 suits people who care about the things a spec sheet can’t capture, while the Sentra suits people who put engine & performance first.
My pick: the Sentra.
Personal opinion based on the data above. Your priorities may differ.