Two vendors walk into the same building. One recommends a machine-room-less traction lift. The other recommends hydraulic. Both are competent, both are quoting in good faith, and the price gap is three lakh rupees. The difference is not sales pressure — it is a genuine engineering fork, and it turns on floor count, roof load and how long you plan to own the building. This comparison lays out how each system works, what each one costs to run, where each one fails, and the specific Indian conditions that flip the answer. Our engineers specify both, so we have no reason to sell you one over the other.
How Each System Works
MRL — machine-room-less gearless traction
A compact permanent-magnet gearless motor mounts inside the shaft, usually at the top beside the guide rails. Steel ropes or coated belts run over the sheave, with the car on one side and a counterweight on the other. The counterweight balances roughly the car plus 45–50% of rated load, so the motor only moves the difference. That is why traction lifts sip power.
The controller sits in a slim cabinet next to the top landing door. No machine room, no separate structure on the roof.
Hydraulic
An electric pump pushes oil into a cylinder. The piston lifts the car. To go down, a valve opens and gravity does the work — the pump does nothing. The power unit sits in a small room that can be up to 10–15 metres away from the shaft, often at the lowest level.
Because the car is pushed from below, the load goes into the pit floor rather than the roof.
Where geared traction fits
Conventional geared traction with a rooftop machine room still makes sense for goods lifts and industrial buildings where robustness beats efficiency. It is not the subject here, but do not assume it is obsolete.
Head-to-Head Comparison
| Factor | MRL Gearless Traction | Hydraulic |
| Machine room | Not required | Small pump room needed |
| Typical travel limit | Up to 60–75 m and beyond | Practical limit around 15–18 m |
| Typical stops | 3 to 20+ | 2 to 6 |
| Speed | 1.0 to 2.5 m/s | 0.3 to 0.6 m/s |
| Roof load | Significant | Minimal |
| Pit depth | 1200–1600 mm | Can go below 1000 mm |
| Energy use | Lowest | 2–3× higher |
| Purchase price (low-rise) | Higher | Lower |
| Purchase price (mid-rise) | Lower | Not viable |
| Ride quality | Smooth, precise levelling | Smooth up, softer levelling |
| Oil in system | None | 150–400 litres |
Space and Building Requirements
MRL removes the machine room, which is worth real money in a city where FSI is expensive and a rooftop structure eats saleable area. It asks for that back in headroom — usually 3800–4500 mm above the top landing — and it puts the full car, counterweight and impact load into the roof slab.
Hydraulic asks for almost nothing from the roof. That single fact makes it the default choice for retrofits into old masonry buildings, heritage structures, and anywhere a structural engineer refuses to add load at the top. It also works with shallow pits, which matters when the basement water table is high.
Hydraulic needs a pump room, though. It is small — roughly 1500 × 1500 mm — but it has to exist somewhere, and it needs ventilation.
Performance
Speed is the clean separator. Hydraulic lifts run at 0.3–0.6 m/s because pushing a column of oil faster gets loud, hot and inefficient. MRL runs comfortably at 1.0–1.75 m/s in residential buildings.
Over three stops, nobody notices. Over eight stops, a hydraulic lift adds 20–30 seconds to every round trip, which compounds into visible queues at 9 am.
Levelling is the second difference. Traction lifts hold level to within a few millimetres and stay there as passengers step in. Hydraulic lifts can drift slightly as oil temperature changes through the day, and re-level with a small pump correction. Modern valve blocks handle this well, but the behaviour exists.
Energy and Running Cost
This is where the two systems separate hardest.
A hydraulic pump lifts the entire weight of the car plus passengers on every up-trip, with no counterweight helping. A traction lift moves only the imbalance. In practice, a hydraulic unit draws roughly two to three times the electricity of a comparable MRL lift on the same duty.
MRL also allows regenerative drives. When the car runs down loaded or up empty, the motor acts as a generator and pushes energy back into the building supply. On a busy commercial lift, that can recover 20–30% of consumption. Hydraulic systems have no equivalent.
Standby draw matters too. A lift sits idle most of the day, and modern MRL controllers drop into sleep mode with cabin lights and fan off.
Maintenance and Reliability
MRL failure points: door operators, controller boards, encoder and brake wear. Ropes need periodic inspection and eventual replacement. Servicing happens inside the shaft, which means the technician works from the car top — safe with proper procedure, but it demands a trained crew and it takes the lift out of service.
Hydraulic failure points: seals, valve blocks, pump noise, oil degradation. The mechanical package is simpler and a competent technician can diagnose most faults from the pump room without entering the shaft. That accessibility is a genuine advantage in buildings with no dedicated lift staff.
The oil is the trade-off. A hydraulic system holds 150–400 litres. Seal leaks are messy, disposal is regulated, and the cylinder in a below-ground installation sits in a casing that has to stay watertight.
Indian Conditions That Change the Answer
Three local realities push the decision harder than any brochure comparison.
Oil temperature. In a Chennai or Ahmedabad summer, a hydraulic pump room can sit at 40°C+ for months. Hot oil thins out, levelling accuracy drops and the system may need a cooler. Vendors quote coolers as optional. In hot, high-traffic installations they are not optional.
Voltage fluctuation. Wide voltage swings are hard on both systems, but VVVF drives on MRL lifts handle them more gracefully than a pump motor starting under full load.
Power cuts and rescue. Here hydraulic has a quiet advantage. On power failure, a hydraulic lift can be lowered to the nearest landing by opening a valve — no battery needed, and the manual rescue procedure is simple. An MRL lift needs an Automatic Rescue Device with a healthy battery to do the same. ARDs work well; the batteries are also the component buildings most often neglect. Whichever system you pick, put battery replacement on the maintenance calendar.
Cost Over Ten Years
For a three-stop building, hydraulic usually wins on purchase price by ₹1.5 lakh to ₹3 lakh. Add electricity at two to three times the rate, plus oil changes and seal work, and the gap narrows by year five and reverses by year eight in a moderately busy building.
For anything above five stops, the comparison ends. Hydraulic loses on speed, energy and practical travel limits together.
Which One Should You Choose?
Choose hydraulic when:
- The building has two to five stops
- The roof cannot take additional load, or the structure is old
- Headroom is limited, or there is no space for a rooftop machine room
- The pit must be shallow
- Traffic is light — a villa, a small clinic, a low-rise office
Choose MRL when:
- The building has five or more stops
- Traffic is regular and waiting time matters
- Electricity cost over 20 years is part of the decision
- You want to avoid oil, pump rooms and disposal entirely
- The building is new and the shaft can be designed around the lift
The short rule: under five stops with a structural constraint, hydraulic. Five stops and above, or any building where the lift runs all day, MRL.
FAQs
Is a hydraulic lift safer than a traction lift? Neither is inherently safer. Both are governed by the same standard — IS 17900, aligned with EN 81-20/50 — and both require door interlocks, overload sensing and passenger protection. Hydraulic systems cannot free-fall because the oil column supports the car, and traction systems use an overspeed governor and safety gear to achieve the same result by a different route.
Can a hydraulic lift go above five floors? Technically yes, with a telescopic cylinder or roped-hydraulic arrangement. Practically it is a poor fit above about 15–18 metres of travel: the speed limit makes trips slow, the energy cost climbs steeply, and cylinder cost rises faster than the equivalent traction package.
Does an MRL lift need a machine room at all? No separate room is required. The machine sits in the shaft and the controller cabinet mounts flush beside the top landing. You still need clear service access to that cabinet and adequate headroom in the shaft, so it is not entirely space-free.
Which is quieter? Inside the car, both are quiet. Outside, MRL is quieter overall because the noise source is a compact gearless motor in the shaft. A hydraulic pump is audible in the pump room and in rooms adjacent to it, which is worth planning around in a home installation.
Which is easier to retrofit into an old building? Hydraulic, in most cases. It needs less headroom, a shallower pit and it puts almost no load on the roof — three constraints that usually decide retrofit feasibility in older masonry structures.
Conclusion
There is no universally better system. There is a better system for your building’s floor count, roof capacity and traffic pattern. Get those three facts on paper and the answer usually decides itself in ten minutes.
Talk to Express Elevators
Express Elevators designs, manufactures and services both MRL traction and hydraulic lifts across India. We survey the building first and recommend the system that fits it — with an itemised quotation and a service network that answers when you call.
Send us your floor plan and floor count. We will tell you which system suits the building, and why.