Portable generators are a handy companion for a variety of uses – from providing back-up power during outages, powering tools on construction sites, driving food trucks or outdoor events, to supporting industrial machines. Choosing the right generator can be tricky—you need to find one that’s powerful enough, not too loud and fits your budget.
Today, we’re comparing two models – the Ryobi RPGENINV4K and the Adventure Kings 3500iO. Both have unique selling points as per their respective brands: the Ryobi is praised for being safe for sensitive electronics with an easy start technology system while the Adventure Kings provides affordable and genuine 3000W continuous power.
Performance & Power
Running Power (W): With values of 3100W and 3000W respectively, there isn’t a significant difference between the Ryobi RPGENINV4K and Adventure Kings 3500iO. This only becomes crucial if you’re planning on using it with power-hungry appliances or tools such as water heaters or industrial vacuums which typically use around 3000W.
Starting Power (W): At a maximum watt value of 4000W, the Ryobi can deliver a far stronger initial surge of power than the Adventure Kings model which maxes out at 3300W. This is an essential quality for equipment that demands a high wattage to start up.
Engine type: Both machines have a similar engine capacity (212 cc in Ryobi and 208 cc in Adventure Kings). They both have OHV (Overhead Valve) engines which allow for better fuel efficiency, enhanced power output, and increased lifespan.
Rated Output (kVA): The Adventure Kings model delivers an output of 3 kVA while this information isn’t specified for the Ryobi model.
Inverter: Both of them are inverter generators. This means they can provide cleaner power suitable for sensitive electronics, be quieter and use fuel more efficiently.
Fuel & Run Time
Fuel Type: Both generators run on petroleum.
Fuel Tank Capacity: Both have a 12 litre fuel tank capacity.
Run Time: The Ryobi has an impressive 12 hours run time at half load, while the Adventure Kings can last 5.5 hours at full load. This might see you refuelling the Adventure Kings more frequently depending on your usage.
Dry Weight: At 35 kg, the Ryobi model is slightly heavier than the Adventure Kings which weighs 30.5 kg. This could make it slightly harder to move but may not be a deal-breaker depending on your physical strength and needs.
Size: The dimensions of the two units aren’t drastically different, so either model will occupy a similar amount of space.
Wheels: Helpful for transportation, only the Ryobi has wheels.
Outlets & Parallel Use
AC Outlets: There are more AC outlets on the Ryobi (3) than on the Adventure Kings (2).
Features & Usability
The Ryobi unit uses easy start technology – a simpler way to get your generator going compared to manual recoil starters like that in the Adventure Kings model. The overload indicator light is the only known feature of the Adventure Kings generator while there is not enough information about key features on the Ryobi generator.
The trade-off for lower starting power in the Adventure Kings model is that it’s slightly quieter than the Ryobi RPGENINV4K (67 dBA vs 66 dBA at 1/4 load). Its noise level is akin to normal conversation when idle and comparable to a vacuum cleaner when under a 2 kW load.
Ryobi RPGENINV4K vs Adventure Kings 3500iO Comparison Table
|Adventure Kings 3500iO
|Not specified Years
|212 cc, OHV
|208 cc, 4-stroke, OHV
|Max / Starting watts
|AC Frequency (Hz)
|Rated Output (kVA)
|Fuel Tank Capacity
|Run time (Hours)
|12 (at half load)
|5.5 (100% Load)
|Dry Weight (Kg)
|Size (L x W x H)
|58.5 x 38 x 54 cm
|50 x 48 x 50 cm
|Number of AC Outlets
|Easy start technology
|Noise Level (dBA)
|66 (at idle), 74 (2KW load)
The Ryobi RPGENINV4K shines with higher maximum power and better mobility due its wheels, while the Adventure Kings 3500iO is lighter and quieter. Deciding between the two will depend on what you prioritize. Whether it’s power, mobility, quietness or weight, both models have unique strengths.