AT4 98 HA

Petrol tractor

A 98cm garden tractor with a 432cc STIGA engine and a hydrostatic drive. Can either mulch clippings or collect them in a 240-litre catcher.
  • Top-quality STIGA engine
  • Sizeable 98cm cutting-width
  • Foot-pedal hydrostatic transmission for intuitive ground-speed adjustment
  • Comfortable, ergonomically optimised seat and steering-wheel
Tax Included

Product details and specs

Large enough to cover a substantial area fast, but compact enough to be easy to manage, the Alpina AT4 98 HA is ideal for gardeners looking to take their first steps into the world of petrol garden tractors!
Supplying an impressive 7.2kw to the blades and rear wheels is a 432cc STIGA ST 450 engine for low-emission operation and excellent fuel-economy; and an electric key ignition-system for rapid, reliable starting every single time.
The highly manoeuvrable AT4 98 HA benefits from a foot-pedal-controlled hydrostatic transmission; a premium feature that gives the driver smooth, car-like ground-speed control with no need to stop and manually change gear.
Both collection- and mulch-capable, and offering seven pre-set cutting-height positions, the AT4 98 HA is an adaptable machine that can be set-up to perform effectively on a wide variety of grass-types (mulch-kit optional).
Powerful headlights will enable you to keep going well into the evening, if necessary; while electromagnetic PTO engagement means you can start and stop the blades at the simple push of a button.
A delight to drive, the AT4 98 HA has an LED dashboard display and combines an Alpina Ergonomic steering wheel with an Alpina Smart low-back seat.
Also featured is an audible warning alarm that alerts you when the 240-litre collector has reached capacity.
This 98cm model is a good match for areas up to 4500m2.

Technical specs

General info
Battery capacity
18 Ah
7.2 kW
Power source
Engine Brand
Engine model
ST 450 Powered by STIGA
432 cm³
Engine rotation speed
2600 rpm
Battery Voltage
12 V
Engine cooling
Fuel tank capacity
6 l
Suggested working area
4500 ㎡
Cutting system
Minimum uncut radius
70 cm
Cutting width
98 cm
Reverse mowing
Blade rotation
Cutting height adjustment
Manual with lever
Cutting height positions
7 positions
Cutting height range
25 - 80 mm
Number of blades
Additional cutting method
Rear discharge, Mulching
Blade engagement type
Drive system
Rear-wheel drive
Transmission method
Transmission type
Collector emptying
Collector capacity
240 l
Steering wheel
Alpina ergonomic
Seat type
Alpina smart with low back support
Seat adjustment
Yes with LED
Front wheel size
Rear wheel size
Hour meter
Cruise control
Washing link
Collector type
Storage compartment
Cup holder
Pivoting front axle
Antiscalp wheels
Safety system
Seat with Safety Contact Breaker
Tools kit
Mulching kit
Battery charger
Trailer hitch kit
Vibration and noise data
Guaranteed sound power level (LwA) - dB(A)
Max vibration on driver's seat (m/s2)
Max vibration on steering wheels (m/s2)
Measured sound power level dB(A)
Measured sound pressure level at operator ear dB(A)
Overall dimensions
Pack weight
243.5 kg
Product length
2338 mm
Product width
1020 mm
Product height
1100 mm
Product weight
204 kg

Related Accessories

10 products


What is the proper way to clean the lawn tractor after mowing the grass?
The exterior of the tractor mower must be cleaned with water and detergent, paying attention not to get water in the electrical system, motor and circuit board located under the instrument panel. The collection bag should be emptied and cleaned of residue, then remounted so the cutting assembly can be washed, and then removed, rinsed and allowed to dry. When washing the cutting device assembly and the expulsion chute, the collection bag or rear discharge shield must be fitted, the operator must be seated, the cutting device assembly must be in position “1”, the engine running, transmission placed in neutral and the cutting device must be connected. Then connect a water hose to the appropriate pipe fittings and allow the water to flow for a few minutes while keeping the cutting devices in motion.
What action should be carried out before winter storage or before storing it for a period longer than 30 days?
After allowing the engine to cool down and fully recharging the battery, disconnect the battery cables and store it in a cool and dry place. Empty the fuel tank, clean the machine thoroughly, check the condition of the cutting device assembly, and, if necessary, contact the service centre. Then store the lawn tractor with the cutting deck in a lowered position, in a sheltered environment and, if possible, covered with a sheet.
What action should be carried out before initially using a riding tractor that has been stored over a winter or for a period longer than 30 days?
Refuel it and check the oil level, air filter and petrol filter. Check that the tyres are correctly pressurised and then set up the lawn mower tractor according to how you intend to carry out the mowing (side discharge, collection, rear discharge, mulching). For further information about the preliminary operations and safety checks, please refer to the designated sections of the instructions manual.
What standard maintenance operations does the lawn mower tractor need?
Before each use, we recommend that you perform safety and control checks, check the tyre pressure, and replenish the fuel and oil tank, if necessary. After each use, arrange for a general cleaning of the riding tractor. Please refer to the designated section of the instruction manual (“maintenance table”) for the regular actions recommended to ensure optimal use of the machine.
What are the cutting functions of the lawn tractor?
The riding tractor can be set up in different cutting modes: rear bag collection or rear discharge, or mowing and chopping the grass using the special “mulching kit” function. The mulching cutting system allows you to mow the grass into fine particles, which remain on the lawn, restore nutrients and support growth.
What kinds of parts and accessories can the lawn tractor be equipped with?
The lawn tractor can be equipped with various parts and accessories to increase its functions and ensure maximum versatility all year round. For the complete list of parts and accessories, please refer to the relevant product page on the website.

Reach Information

Information on Article 33 of REACH Regulation concerning STIGA Group products. Discover more

Reach Information

AT4 98 HA
382722476/0 PC BOARD MP84 (ISO) Waterwei Lead 7439-92-1
118120007/0 BATTERY 12V 18AH [HAIJIU] Lead 7439-92-1
382004618/0 DECK ENGAGE CABLE Lead 7439-92-1
118400921/0 HYDRO TRANSAXLE T2-ADBF-2X3C-1RX1 1) SEALANT MATERIAL : Octamethylcyclotetrasiloxane
2) PLUG 9/16-18 METAL: Lead
3) ROD BYPASS .375 X 3.81: Lead
6) FITTING 5/16 SAE, 5/32 TUBE: Lead
1) 556-67-2
2) 7439-92-1
3) 7439-92-1
4) 7439-92-1
5) 7439-92-1
6) 7439-92-1
125601577/0 PULLEY Lead 7439-92-1
Component 1 Component description 1 Substance/s CAS number Component 2 Component description 2 Component 3 Component description 3 Component 4 Component description 4 Component 5 Component description 5
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