Infiniti QX70: which version to buy
There is one Infiniti QX70 generation (October 2013–January 2019), one body — SUV 5-doors — and four catalogue versions, all Automatic, 7 speeds, AWD. The buying choice is not “which generation” but which of two 5.0 AT V-shaped 8-cylinder Gasoline engines (420 hp vs 400 hp), the 3.7 AT Gasoline 6, or the 3.0 AT Diesel 6.
There is one Infiniti QX70 generation (October 2013–January 2019), one body — SUV 5-doors — and four catalogue versions, all Automatic, 7 speeds, AWD. The buying choice is not “which generation” but which of two 5.0 AT V-shaped 8-cylinder Gasoline engines (420 hp vs 400 hp), the 3.7 AT Gasoline 6, or the 3.0 AT Diesel 6. Those four rows decide 0–100, payload, clearance, and how much fuel the 90 L tank actually buys.
Infiniti QX70 specs: four versions, same years
All four ran the full window 2013-10-01 to 2019-01-31. No restyle is listed as a separate generation. Where two rows share the name 5.0 AT, they are different cars: 420 hp / Euro 5 / 164 mm clearance versus 400 hp / Euro 4 / 184 mm clearance.
| Version | hp (kW @ rpm) | Nm @ rpm | cc | Fuel | Cyl. / layout | Boost | Gearbox | Drive |
|---|---|---|---|---|---|---|---|---|
| 5.0 AT (420 hp) | 420 (309 @ 6500) | 500 @ 4400 | 5026 | Gasoline | 8, V-shaped | No | Automatic 7 | AWD |
| 3.0 AT | 238 (175 @ 3750) | 550 @ 1750–2500 | 2993 | Diesel | 6, V-shaped | Turbo | Automatic 7 | AWD |
| 3.7 AT | 320 (235 @ 7000) | 367 @ 5200 | 3696 | Gasoline | 6, V-shaped | No | Automatic 7 | AWD |
| 5.0 AT (400 hp) | 400 (294 @ 6500) | 500 @ 4400 | 5026 | Gasoline | 8, V-shaped | No | Automatic 7 | AWD |
Engine position is Front, longitudinal on every row. Gasoline 5.0 AT (both) and 3.7 AT use Distributed injection (multi-point); the 3.0 AT Diesel fuel system is not measured. Compression: 3.0 AT 16, 3.7 AT 11, 5.0 AT (400 hp) 10.9, 5.0 AT (420 hp) not measured. Bore × stroke: 3.0 AT 84 × 90, 3.7 AT 95.5 × 86, 5.0 AT (400 hp) 95.5 × 87.7, 5.0 AT (420 hp) not measured. Valves per cylinder: 4 on all four.
Fuel grade: 95 on all three Gasoline rows; Diesel on 3.0 AT.
Infiniti QX70 horsepower, 0–100, and what extra power buys
Ranked by 0–100 km/h:
- 5.0 AT (420 hp): 5.6 s, 300 km/h
- 5.0 AT (400 hp): 5.8 s, 250 km/h
- 3.7 AT: 6.8 s, 233 km/h
- 3.0 AT: 8.3 s, 212 km/h
The 20 hp gap between the two 5.0 AT rows is 5% of 400 hp. It buys 0.2 s to 100 and 50 km/h of top speed (300 vs 250). Both make 500 Nm at 4400 rpm from 5026 cc; the 420 hp peak is still at 6500 rpm, so the extra 20 hp is at the same engine speed, not a different torque curve on paper.
3.7 AT is 100 hp below the 420 hp 5.0 AT (−24%) and 80 hp below the 400 hp 5.0 AT (−20%). Versus 420 hp that is +1.2 s to 100 and −67 km/h top speed; versus 400 hp it is +1.0 s and −17 km/h.
3.0 AT is the only Turbo and the only Diesel. Peak 238 hp is 182 hp below the 420 hp 5.0 AT (−43%) and 82 hp below 3.7 AT (−26%). 0–100 is 2.7 s slower than 420 hp 5.0 AT and 1.5 s slower than 3.7 AT. Top speed 212 km/h is 88 km/h below 420 hp 5.0 AT and 21 km/h below 3.7 AT.
Torque ranking is not the same as horsepower: 3.0 AT 550 Nm, both 5.0 AT 500 Nm, 3.7 AT 367 Nm. The Diesel makes its 550 Nm from 1750–2500 rpm; Gasoline peaks sit at 4400 rpm (5.0 AT) and 5200 rpm (3.7 AT). Per litre: 3.0 AT 183.8 Nm/L (550 / 2.993), both 5.0 AT 99.5 Nm/L (500 / 5.026), 3.7 AT 99.3 Nm/L (367 / 3.696). The Diesel’s specific torque is about 1.85× the Gasoline V-shaped 8.
Specific power (hp per litre of 5026 / 3696 / 2993 cc):
- 3.7 AT: 86.6 hp/L (320 / 3.696)
- 5.0 AT (420 hp): 83.6 hp/L (420 / 5.026)
- 5.0 AT (400 hp): 79.6 hp/L (400 / 5.026)
- 3.0 AT: 79.5 hp/L (238 / 2.993)
The 3696 cc Gasoline 6 is the densest power plant in the table; the 420 hp 5.0 AT is denser than the 400 hp 5.0 AT by 4.0 hp/L on the same 5026 cc.
Kerb weight per horsepower:
- 5.0 AT (420 hp): 5.00 kg/hp (2098 / 420)
- 5.0 AT (400 hp): 5.25 kg/hp (2098 / 400)
- 3.7 AT: 6.28 kg/hp (2010 / 320)
- 3.0 AT: 8.74 kg/hp (2080 / 238)
The lightest kerb is 3.7 AT at 2010 kg — 88 kg below both 5.0 AT (2098 kg) and 70 kg below 3.0 AT (2080 kg). That still leaves it 1.28 kg/hp heavier than the 420 hp V-shaped 8 because it has 100 hp less, not because it is overweight.
There is no separate “Sport” row in the data. Horsepower buyers looking at Infiniti QX70 Sport horsepower in search still only have these four catalogue figures.
Infiniti QX70 mpg and tank: 90 L, four mixed figures
Tank is 90 L on every version. Combined consumption:
- 3.0 AT: 9.0 L/100 km city 11.2 / highway 7.8
- 3.7 AT: 12.2 L/100 km city 17.1 / highway 9.4
- 5.0 AT (420 hp): 12.8 L/100 km city 18.3 / highway 9.6
- 5.0 AT (400 hp): 13.1 L/100 km city 18.8 / highway 9.8
Arithmetic range on a full 90 L tank at the combined figure: 3.0 AT 1000 km (90 / 9.0 × 100), 3.7 AT 738 km, 5.0 AT (420 hp) 703 km, 5.0 AT (400 hp) 687 km. The Diesel’s mixed figure is 3.2 L/100 km below 3.7 AT (−26%) and 3.8 L/100 km below 420 hp 5.0 AT (−30%). Highway gap is smaller: 3.0 AT 7.8 vs 3.7 AT 9.4 (+1.6) vs 420 hp 5.0 AT 9.6 (+1.8). City is where Gasoline costs: 3.0 AT 11.2 vs 3.7 AT 17.1 (+5.9) vs 420 hp 5.0 AT 18.3 (+7.1) vs 400 hp 5.0 AT 18.8 (+7.6).
The two 5.0 AT rows are not identical on fuel: 400 hp uses 0.5 L/100 km more in the city, 0.2 more on the highway, 0.3 more combined than 420 hp — and is 0.2 s slower. Extra power here does not cost extra fuel in the catalogue.
CO2: 3.0 AT 238 g/km, 3.7 AT 282 g/km, 5.0 AT (400 hp) 307 g/km, 5.0 AT (420 hp) not measured. Eco class: only the 420 hp 5.0 AT is Euro 5; the other three are Euro 4.
Engine oil capacity, oil type, air filter, mounts, and engine-bay service volumes are not measured in this dataset.
Infiniti QX70 weight, payload, clearance, wheels
Kerb / gross (kg) and payload (gross − kerb):
- 5.0 AT (420 hp): 2098 / 2320, payload 222 kg
- 5.0 AT (400 hp): 2098 / 2320, payload 222 kg
- 3.7 AT: 2010 / 2500, payload 490 kg
- 3.0 AT: 2080 / 2749, payload 669 kg
3.0 AT gross 2749 kg is 429 kg above the 5.0 AT pair (2320 kg) and 249 kg above 3.7 AT (2500 kg). Payload on the Diesel is 3.0× the V-shaped 8 (669 / 222) and 1.37× 3.7 AT (669 / 490). If the QX70 is a load vehicle, 3.0 AT is the arithmetic answer; the 8-cylinder rows are the worst payload in the table despite matching the Diesel’s kerb within 18 kg.
Ground clearance: 5.0 AT (420 hp) 164 mm; 3.0 AT, 3.7 AT, and 5.0 AT (400 hp) 184 mm. The 420 hp row sits 20 mm lower. Wheel sizes are listed only on 3.7 AT: 265/50 R20 and 265/45 R21. On 5.0 AT (both) and 3.0 AT, wheels are not measured. Length, width, and a size comparison in millimetres are not measured.
Chassis pattern is shared: Independent, spring front and rear. Front brakes Ventilated disc on all four. Rear: 5.0 AT (420 hp) Disc; the other three Disc ventilated (label as in data).
Which Infiniti QX70 version to choose
Buy 5.0 AT (420 hp) if the ranking is 0–100 and top speed: 5.6 s and 300 km/h, 5.00 kg/hp, Euro 5, same 500 Nm and 5026 cc as the 400 hp twin. Cost of that choice: 164 mm clearance (20 mm less than the other three), payload only 222 kg, mixed 12.8 L/100 km, CO2 not measured, compression and bore × stroke not measured, rear brakes Disc not ventilated, wheels not measured.
Buy 5.0 AT (400 hp) if you want the same 8-cylinder 5026 cc / 500 Nm / Automatic 7 / AWD layout but 184 mm clearance, Euro 4, compression 10.9, bore × stroke 95.5 × 87.7, rear Disc ventilated, and 250 km/h instead of 300. You give up 20 hp, 0.2 s, and 50 km/h, and you use 0.3 L/100 km more combined (13.1 vs 12.8). Same 2098 / 2320 kg and 222 kg payload. There is no price in this catalogue; the “extra money” comparison is only these measured deltas.
Buy 3.7 AT if you want the lightest kerb (2010 kg), the highest specific power (86.6 hp/L), the only listed wheels (265/50 R20, 265/45 R21), 184 mm clearance, 6.8 s / 233 km/h, and 490 kg payload — more than double either 5.0 AT. You give up 80–100 hp versus the two V-shaped 8s, 1.0–1.2 s to 100, and 17–67 km/h top speed. Mixed 12.2 L/100 km is 0.6 below 420 hp 5.0 AT and 0.9 below 400 hp 5.0 AT — not a Diesel saving. Peak 367 Nm at 5200 rpm is the lowest torque and the highest torque rpm. Compression 11, 95.5 × 86, 6 cylinders, Boost No, Gasoline 95, Euro 4, CO2 282 g/km.
Buy 3.0 AT if torque, payload, and tank range rank first: 550 Nm from 1750–2500 rpm, 669 kg payload, 9.0 L/100 km combined, ~1000 km on 90 L, CO2 238 g/km. You accept 238 hp, 8.3 s, 212 km/h, 8.74 kg/hp, Turbo Diesel, Euro 4, compression 16, 84 × 90, fuel system not measured, wheels not measured. Versus 3.7 AT you lose 82 hp and 1.5 s but gain 183 Nm, 179 kg payload, 3.2 L/100 km combined, and the same 184 mm clearance.
Shared non-choices: every version is AWD Automatic 7, SUV 5-doors, one generation, 90 L tank. Reliability, MSRP, “for sale near me,” 2026 production, and oil capacity are not in this dataset — they are not measured here, so they cannot decide the row.
If the use is highway pace and 8-cylinder character: 5.0 AT 420 hp when 300 km/h and Euro 5 matter, 5.0 AT 400 hp when 184 mm and the fully measured 10.9 / 95.5 × 87.7 engine geometry matter. If the use is mixed mass and listed wheels: 3.7 AT. If the use is load and litres: 3.0 AT.