Infiniti M Y51
The record-breaking hybrid saloon that prioritised performance over piety.
- Power
- 364 bhp
- 0–60 mph
- 5.2 s
- Top speed
- 155 mph
- Est. value
- $9k–$15k
About the Infiniti M Y51
The Infiniti M35h (Y51) arrived as a performance-oriented alternative to the hybrid establishment, utilizing a 'Direct Response' one-motor, two-clutch system. It gained global notoriety in 2011 by setting a Guinness World Record for the fastest-accelerating full hybrid, proving that electrification could enhance driver engagement rather than just efficiency. The powertrain pairs a high-revving VQ35HR V6 with a 50kW electric motor, allowing for high-speed electric cruising and immediate torque delivery. While its trunk space is compromised by the lithium-ion battery pack, the M35h remains a technically sophisticated sleeper with a chassis tuned for rear-wheel-drive dynamics.
Infiniti M Y51 specs
The Infiniti M Y51 produces 364 bhp (271 kW) and 350 Nm (258 lb-ft) of torque. It reaches 60 mph in 5.2 seconds and has a top speed of 155 mph (250 km/h).
| Make | Infiniti |
|---|---|
| Model | M |
| Generation | Y51 |
| Trim | 3.5h |
| Years | 2011–2013 |
| Type | Saloon |
| Body style | Saloon |
| Country | Japan |
| Original price | About $54,000 when new |
| Engine | 3.5-litre V6 hybrid |
|---|---|
| Displacement | 3,498 cc (3.5 litres) |
| Induction | Naturally aspirated |
| Power | 364 bhp (271 kW) at 6,800 rpm |
| Torque | 350 Nm (258 lb-ft) |
| Redline | 7,500 rpm |
| 0–60 mph | 5.2 s |
| Top speed | 155 mph (250 km/h) |
| Transmission | 7-speed automatic |
| Drivetrain | Rear-wheel drive |
| Weight | 1,876 kg (4,136 lb) |
| Power-to-weight | 194 bhp per tonne |
Typical figures for the standard car; options, markets and model years vary. Where our specs come from
How much is an Infiniti M Y51 worth?
A typical Infiniti M Y51 is estimated to be worth $8,500 – $15,000 (about £6,300 – £11,000).
Its original price when new was about $54,000.
Values are directional estimates for a typical example, not appraisals. Condition, mileage, history and specification all change what a real car is worth. Pound figures use the exchange rate of 3 November 2026. How values are estimated
Infiniti M Y51 rarity in CarSpot
The Infiniti M Y51 is an Uncommon card in CarSpot, with a rarity score of 15 out of 100. Hot hatches and premium sporty cars. An Uncommon card is worth 20 XP.
Each model's tier starts from a 0–100 score based on its value plus its power or production numbers. Once enough players have spotted a model, how often it is spotted can move it up or down one tier. How CarSpot rarity works
Rarity is a collectible game mechanic, not an assessment of real-world scarcity or value.
Infiniti M Y51 fun facts
- In 2011, the M35h set a Guinness World Record at Santa Pod Raceway, covering the standing quarter-mile in 13.9 seconds.
- It was the first production hybrid capable of cruising on electric power alone at speeds of up to 75 mph (120 km/h).
- The M35h was rebranded as the Infiniti Q70 for the 2014 model year as part of the brand's global naming realignment.