Spacia vs N-Box vs Roox 2024 — The Kei MPV Showdown
Three of Japan's best-selling kei MPVs head-to-head for the Sri Lankan family that wants kei-class tax savings without giving up sliding doors and tallboy interior. Landed price LKR 8–12M.
The kei-class MPV is Japan’s quietest market dominance — the Honda N-Box has been Japan’s best-selling car for the better part of a decade, and the Suzuki Spacia and Nissan Roox have followed with their own takes on the same recipe: 660cc engine, sliding rear doors, tallboy interior, four seats, and aggressively low tax.
The post-Feb-2025 SL import reopen has put all three into active inventory. For a Sri Lankan family that wants kei-class tax savings on a body practical enough for kids, school runs, and weekend trips — this is the cross-shop.
Snapshot — 2024–2025 mid-grade examples
| Suzuki Spacia 2025 | Honda N-Box 2024 | Nissan Roox 2024 | |
|---|---|---|---|
| Engine | 660cc 3-cyl + ISG mild hybrid | 660cc 3-cyl petrol (or turbo) | 660cc 3-cyl + mild hybrid |
| Power (NA) | 47 hp | 58 hp | 52 hp |
| Real-world km/L | 22–25 | 19–22 | 20–23 |
| Sliding rear doors | Both sides | Both sides | Both sides |
| Seats | 4 | 4 | 4 |
| Active safety | Suzuki Safety Support (XZ+) | Honda Sensing (standard) | ProPILOT (Highway Star X PP edition) |
| Indicative FOB | JPY 1.95–2.15M | JPY 1.6–2.2M | JPY 1.4–1.7M |
| Indicative landed | LKR 9–12M | LKR 8–11M | LKR 8–10M |
| SL inventory volume (2024+) | 56 | 100 | 45 |
The case for each
Suzuki Spacia 2025 — the value-with-newness pick
The 2025 Spacia gets the latest Suzuki Safety Support bundle on Hybrid XZ trim, the most recent ISG mild-hybrid system, and Suzuki’s well-developed kei service ecosystem in Sri Lanka via existing Wagon R and Alto buyer base. It’s the natural step-up for an existing Wagon R owner. See the Suzuki Spacia 2025 review.
Live Spacia listings · landed LKR 9–12M for Hybrid XZ.
Honda N-Box 2024 — the volume / interior-space pick
The N-Box has been Japan’s best-selling car overall — not just kei — multiple years running. The reason: Honda built the most spacious kei interior on the market. Rear seat headroom is class-leading, the centre tank layout opens floor space, and Honda Sensing is standard across the lineup (not just the top trim).
The N-Box is also the highest-volume 2024+ kei in active SL imports, with roughly 100 examples (Base + Custom + Fashion Style trims combined). The deepest inventory pool of the three.
Live N-Box listings · landed LKR 8–11M for Base Grade.
Nissan Roox 2024 — the tech-feature pick
The Roox is mechanically related to the Mitsubishi eK Space (Nissan-Mitsubishi alliance). Its differentiator is the Highway Star X ProPILOT Edition — Nissan’s adaptive cruise + lane-centring system, normally found only on far more expensive cars. For a buyer who specifically wants ProPILOT in a kei body, this is the one.
Live Roox listings · landed LKR 8–10M for Highway Star X.
Sri Lanka tax math — identical excise band
All three sit in the same 660cc kei excise band:
| Component | Spacia | N-Box | Roox |
|---|---|---|---|
| Excise (660 × 1,200) | LKR 792,000 | LKR 792,000 | LKR 792,000 |
| Luxury tax | 0 | 0 | 0 |
The landed-price differences come entirely from CIF (Japan auction price). The N-Box Base Grade and Roox X grade auction for similar money; the Spacia Hybrid XZ carries a roughly LKR 600k auction premium for the higher trim level.
For the full breakdown, see landed price explained.
Real-world economy and 5-year fuel cost
At LKR 388/L petrol, 12,000 km/year × 5 years:
| Real km/L | 5-year fuel cost | |
|---|---|---|
| Suzuki Spacia 2025 | 23 | LKR 1,012,000 |
| Honda N-Box 2024 (NA) | 21 | LKR 1,108,000 |
| Nissan Roox 2024 | 22 | LKR 1,058,000 |
The fuel-cost spread across all three is under LKR 100k over five years — effectively a rounding error. Choose on other dimensions; fuel economy is not the deciding factor.
How they actually differ
| Spacia | N-Box | Roox | |
|---|---|---|---|
| Interior space | Class-best headroom | Class-best floor + headroom | Slightly tighter than the other two |
| Active safety | XZ trim only | Standard across all trims | Top trim only |
| Driving feel | Suzuki feel — light, predictable | Honda feel — slightly more polished | Nissan feel — quieter, less direct |
| Ride quality | Average | Best of three | Slightly bouncier |
| SL inventory pool | Moderate | Largest | Smallest |
| Service-mechanic familiarity in SL | High (Wagon R legacy) | High (Honda dealer network) | Low (newest entrant) |
| Standout feature | Latest Safety Support, lowest gear with most safety kit | Highest interior space, Honda Sensing standard | ProPILOT in a kei body |
When each wins
| Pick the Spacia if… | Pick the N-Box if… | Pick the Roox if… |
|---|---|---|
| You currently own a Wagon R and want the upgrade path | You want the most spacious kei interior | You specifically want ProPILOT |
| Latest hybrid/safety kit on a 2025 car matters | You want the deepest 2024+ inventory pool | You want the lowest landed price |
| You’re cross-shopping with the older Wagon R | Active safety as standard matters more than trim level | Quieter ride matters |
Our verdict
There is no single winner. The honest ranking depends on what you value.
- Most spacious, most-available, safety-as-standard — Honda N-Box.
- Most modern hybrid kit on a 2025 build — Suzuki Spacia Hybrid XZ.
- ProPILOT in a kei body — Nissan Roox Highway Star X ProPILOT Edition.
For the typical Sri Lankan family upgrading from a Wagon R or Alto, the Honda N-Box is the rational default — biggest interior, deepest inventory, safety standard. The Spacia is the next-best for an existing Suzuki owner. The Roox is for tech-feature buyers specifically.
Send us your spec and we’ll come back with current Japan auction examples across all three brands.
Read also
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