Rivian R1S

Which Rivian R1S version to buy: AT 408 hp vs AT 710 hp vs AT 764 hp

If you are choosing a Rivian R1S, the catalogue has one generation and three electric versions, all named AT. They share the same body (SUV 5-doors), the same December 2021 start, the same AWD layout, the same Automatic 1-speed gearbox, the same 201 km/h top speed, the same 3500 kg gross weight, and the same 205 mm ground clearance.

Which Rivian R1S version to buy: AT 408 hp vs AT 710 hp vs AT 764 hp

If you are choosing a Rivian R1S, the catalogue has one generation and three electric versions, all named AT. They share the same body (SUV 5-doors), the same December 2021 start, the same AWD layout, the same Automatic 1-speed gearbox, the same 201 km/h top speed, the same 3500 kg gross weight, and the same 205 mm ground clearance. The buying decision is therefore not “which generation” and not “which body.” It is which AT power rating you need: 408 hp, 710 hp, or 764 hp.

There is no second generation to compare. Production of generation 1 started on 2021-12-01 and has no stop date in the data. There is no restyling listed as a separate generation. All three AT versions sit inside that one generation.

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Specs: three AT versions, same name, different power

Use the horsepower figure as the identifier. Two (in fact three) versions share the exact catalogue name AT; renaming them would break modification links.

Displacement, cylinder count, cylinder layout, and boost are not measured on any of the three Electro versions. Power per litre cannot be calculated: there is no engine displacement in the data.

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Engine and power: what the extra output actually is

AT 764 hp is the peak of the range: 764 hp and 561 kW. Against AT 408 hp that is +356 hp and +261 kW — 87% more horsepower (356 ÷ 408) and 87% more kilowatts (261 ÷ 300). Torque doubles: 1120 Nm versus 560 Nm (+560 Nm).

AT 710 hp sits between them: 710 hp and 522 kW. Versus AT 408 hp that is +302 hp and +222 kW — 74% more horsepower (302 ÷ 408) and 74% more kilowatts (222 ÷ 300). Torque is again 1120 Nm, the same doubling as the 764 hp AT.

AT 764 hp versus AT 710 hp is a smaller step: +54 hp and +39 kW — about 7.6% more horsepower (54 ÷ 710) and about 7.5% more kilowatts (39 ÷ 522). Torque does not change: both are 1120 Nm. If the reason to step up from 710 hp is “more twist,” the numbers do not support that step.

All three are Electro fuel, Automatic, 1 speed, AWD. There is no gearbox or drive split to buy into.

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Performance: 0–100 km/h, top speed, mpg

AT 764 hp is the fastest to 100 km/h at 3.2 s. AT 710 hp is 0.2 s slower (3.4 s). AT 408 hp is 1.9 s slower than the 764 hp AT (5.1 − 3.2) and 1.7 s slower than the 710 hp AT (5.1 − 3.4).

Top speed does not change with power: 201 km/h on all three. Extra horsepower does not buy a higher listed maximum.

City, highway, and combined consumption (mpg / l/100 km) are not measured on any version. CO2 is 0 on all three. Economy cannot be used as a tie-breaker from this dataset.

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Dimensions, weight, tank, wheels, clearance

Kerb weight is not measured on any AT version. Gross vehicle weight is 3500 kg on all three. Tank capacity is not measured (Electro, no tank figure). Wheel sizes are not measured. Ground clearance is 205 mm on all three.

Using gross weight as a stand-in (kerb is not measured), mass per horsepower is:

• AT 408 hp: 3500 ÷ 408 ≈ 8.58 kg per hp
• AT 710 hp: 3500 ÷ 710 ≈ 4.93 kg per hp
• AT 764 hp: 3500 ÷ 764 ≈ 4.58 kg per hp

The 764 hp AT has about 47% of the gross-weight-per-hp of the 408 hp AT (4.58 ÷ 8.58). The 710 hp AT is close to the 764 hp AT on this ratio (4.93 vs 4.58). Because kerb weight is not measured, these ratios are gross-weight arithmetic only.

Chassis hardware does not split the versions:

• Front suspension: Independent, spring (all three)
• Rear suspension: Independent, spring (all three)
• Front brakes: Ventilated disc (all three)
• Rear brakes: Disc (all three)

You do not get a different suspension or brake type by choosing a higher-power AT.

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Reliability and problems

No reliability scores, failure rates, or listed problems are in the launch data. Those items are not measured here. Do not treat silence as a clean bill of health or as a known defect list.

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Which version to choose

Choose AT 408 hp if the job is a 5-door SUV with AWD and you do not need the torque doubling. You still get Electro drive, Automatic 1-speed, AWD, 201 km/h, 3500 kg gross, 205 mm clearance, and 0 CO2. You give up 356 hp versus the 764 hp AT and 302 hp versus the 710 hp AT. 0–100 km/h is 5.1 s — still the slowest of the three, but the only AT that stays at 560 Nm instead of 1120 Nm.

Choose AT 710 hp if you want the 1120 Nm torque step and most of the acceleration, without the last 54 hp. Versus the 408 hp AT you gain 302 hp, 222 kW, 560 Nm, and 1.7 s on 0–100 (3.4 vs 5.1). Versus the 764 hp AT you lose 54 hp and 0.2 s to 100 km/h, with identical torque, top speed, gross weight, and clearance. This is the middle of the three AT versions by power and by 0–100.

Choose AT 764 hp if the remaining 0.2 s and 54 hp matter. It is the strongest AT: 764 hp, 561 kW, 1120 Nm, 3.2 s to 100 km/h. It does not raise top speed above 201 km/h, does not change gross weight from 3500 kg, and does not change clearance from 205 mm. The gap versus AT 710 hp is small on the numbers that are measured; the gap versus AT 408 hp is large (nearly double torque, 87% more power, 1.9 s quicker to 100 km/h).

There is no generation choice. Generation 1 is the only generation: SUV 5-doors, three AT versions, from 2021-12-01, stop not measured. Extra money, in this catalogue, can only buy a different AT power rating — not a newer generation, not a different body, not a different gearbox, not a different drive, and not a measured change in mpg, kerb weight, tank, or wheels.

If consumption, kerb weight, or wheel size is the deciding factor, those figures are not measured on any Rivian R1S AT version in this dataset.