Infiniti QX65 Performance Explained: Horsepower, Torque and Drive Modes

Here's the most useful tip first: pick one familiar stretch of road, drive it in the QX65's default mode, then drive it again in its sportiest mode. That back-to-back run tells you more about how the SUV behaves than any number on a window sticker. At Infiniti of Smithtown in St James, we hear the same questions from shoppers and new owners: what do horsepower and torque actually mean, and what do the drive modes really change? Here's the plain-English version, built one step at a time.

Engine and Horsepower Basics

Horsepower measures how much work an engine can do, and it matters most once you're already moving. It's what you feel when you merge onto the Northern State with traffic flowing fast, or pass a slow truck on the Long Island Expressway. More horsepower means the engine keeps pulling hard as speed climbs.

The QX65 uses a turbocharged engine. A turbo uses energy from the exhaust to force extra air into the engine, so a smaller engine can make the kind of power that once took more cylinders. In practice, turbo power tends to feel strong in the middle of the rev range, which is right where most real-world driving happens.

Here's what a lot of shoppers miss. Peak horsepower arrives at one point, high in the rev range, and you rarely spend time there. Between lights on Jericho Turnpike, you're well below it. Treat the headline number as a ceiling that tells you what the SUV can do when you ask for everything, not a description of how it feels at in-town speeds.

So horsepower answers one question: how confidently will this SUV handle highway merges and passing? For everything else, you need to look at torque and the drive modes, which shape how that power shows up under your right foot.

How Horsepower, Torque and RPM Fit Together

Two numbers, one engine

Torque is twisting force, the push that gets the wheels turning. Horsepower is torque multiplied by how fast the engine is spinning. That's why the two numbers rise and fall together, and why neither one tells the whole story alone.

Think of torque as the shove you feel from a stop and horsepower as the stamina that keeps the shove going at higher speeds. An engine with strong torque low in the rev range feels eager around town. One with high peak horsepower but weak low-end torque can feel lazy until you rev it.

Why the curve matters more than the peak

Spec sheets list a maximum for each, usually with an rpm attached. The rpm tells you where that peak lives. A torque peak that arrives early, and stays flat across a wide band, is what makes a turbo SUV feel effortless in traffic.

Weight also plays a part. A midsize luxury SUV carries passengers, cargo and a lot of equipment, so the same engine will feel different with just you aboard than with a full car heading to the beach. Keep that in mind on a test drive, and bring the people who usually ride with you if you can.

How Drive Modes Change the Feel

Drive modes are one of the most misunderstood features on any modern SUV. A mode doesn't add horsepower or torque. What it changes is how quickly and how eagerly the vehicle hands that power over to you.

Depending on equipment, a mode selector can adjust several systems at once:

• Throttle mapping, meaning how much the engine responds to a small press of the pedal
• Shift behavior, such as holding gears longer or shifting up early to stay smooth and quiet
• Steering weight, which can feel lighter for parking or firmer for confidence at speed
• All-wheel-drive behavior, where equipped, to help in slippery conditions

A comfort-focused setting keeps things calm. You get gentle starts, early upshifts and light steering. A sport setting sharpens throttle response so the QX65 reacts faster to your foot, and it keeps the engine in a livelier part of its rev range so power is ready the moment you ask.

That's why sport mode can feel like it adds power when it doesn't. You're simply getting to the strong part of the torque curve sooner. Economy-leaning settings do the opposite, softening response to encourage smoother, more efficient driving.

Choosing the Right Mode for the Drive

Your QX65's selector shows exactly which modes your trim offers, and the owner's manual explains what each one adjusts. Once you know what's available, matching a mode to the drive gets easy.

Here's a practical way to think about it:

• Stop-and-go on Jericho Turnpike or Nesconset Highway: the default or comfort setting. Smooth starts beat quick ones in heavy traffic.
• Long highway runs on the LIE: comfort or economy for a quieter, more relaxed cruise.
• On-ramps and twisty roads: sport, for quicker response and steadier steering.
• Snow, slush or heavy rain: a weather-oriented mode if your QX65 has one, which softens throttle response to reduce wheelspin.

You don't have to leave a mode on all day. Plenty of owners drive in comfort and switch to sport just for a merge or a winding stretch of 25A, then switch back. The change is quick and safe to make while driving.

If your QX65 offers a personal or custom mode, it's worth setting up. You might like sharp throttle response with lighter steering, or the reverse. Spend a week trying combinations and you'll land on a setting that feels made for your commute.

Handling on Long Island Roads

Long Island driving asks a lot of a suspension. You've got expansion joints on the Expressway, sweeping curves on the Northern State and Sunken Meadow, tight turns through the North Shore villages, and potholes that bloom every spring. Good handling here means staying composed over rough pavement while still feeling steady in a curve.

The QX65 is a midsize luxury SUV, so it rides higher and carries more weight than a sedan. That height gives you a commanding view in traffic, but it also means the body can lean in corners. Firmer steering in a sport setting helps you feel planted, while comfort settings put ride quality first over broken pavement.

All-wheel drive, where equipped, earns its keep in our weather. Wet leaves on back roads in the fall, slush on side streets in January, a sudden downpour on the parkway: AWD helps put power down when one tire starts to slip. It helps you get moving and stay moving. It does not shorten stopping distances, so tires and following distance still matter most.

The best handling test is your own route. Drive the curves and bumps you deal with every week, and pay attention to how settled the QX65 feels when you hit a rough patch mid-corner.

Torque and Everyday Driving

For most daily driving, torque matters more than horsepower. It's the force you feel pulling away from a light, climbing the hills around the North Shore harbors, or squeezing into a gap in traffic. Strong low-end torque is what makes an SUV feel relaxed instead of strained.

Turbocharged engines are known for delivering torque early. Once the turbo is spinning, a broad band of pulling power arrives without needing to rev the engine hard. You'll notice it most with a full load: kids, gear and a weekend bag in the back, heading out toward the East End.

What turbo lag feels like

You may notice a brief pause between pressing the pedal and the full surge of power, especially from very low speeds. That's turbo lag, and modern turbo engines keep it short. A sport setting can make it less noticeable by keeping the engine in a livelier rev range.

Torque also shapes how the transmission behaves. With plenty of it on tap, the transmission can shift into higher gears sooner and still pull smoothly, which keeps the cabin quiet at cruising speed. Downshifts are less frequent because the engine doesn't need high revs to respond. For a commuter, that adds up to a calmer drive.

Getting the Most From Your QX65

A turbo engine rewards a little attention. These habits keep the QX65 feeling the way it did on day one:

• Use the fuel grade recommended in your owner's manual and on the fuel door. Turbo engines are tuned around it.
• Go easy for the first few minutes of a cold start, especially in winter, so the oil reaches full temperature before you ask for hard acceleration.
• Check tire pressure monthly. Long Island temperature swings change pressure, and soft tires dull steering response and handling.
• Stay on the maintenance schedule. Fresh oil matters to a turbocharger, which spins very fast and relies on clean lubrication.

Tires deserve their own mention. They're the only thing connecting all that engineering to the road. Worn or mismatched tires will make the best drive mode feel vague, and all-season tires near the end of their life lose a lot of grip in the wet.

Infiniti of Smithtown has dedicated service and parts departments, so routine maintenance, tire work and anything a warning light flags can be handled in one place. When it's time for an oil change or an inspection, you can book service online and keep your QX65's performance where it should be.

What to Do Next

The fastest way to understand the QX65's performance is to drive it on roads you know. Plan your test drive like a short checklist:

• Start in the default mode and pull away from a light on Jericho Turnpike. Notice how smooth it feels.
• Merge onto the Northern State or the LIE and note how readily it picks up speed.
• Switch to sport and repeat the same stretch. Pay attention to throttle response and steering weight.
• Find a rough road or a curve and see how settled it stays.
• Try a parking lot to judge low-speed steering and visibility.

Bring whoever usually rides with you, and if you haul gear, think about how the SUV will feel with that weight aboard. Ask us to show you the drive mode selector and any custom settings before you head out, so you aren't hunting through menus at a red light.

Infiniti of Smithtown is owned by Tantillo Auto Group, and the store's new ownership is focused on redefining the luxury automotive experience. When you're ready, browse our new QX65 inventory and pick one to drive on your own commute. Ten minutes on familiar roads will tell you more than any spec sheet.