Comparison tool

Two vehicles, one set of assumptions

Pick up to four exact EPA configurations. All get the same mileage, driving mix, and energy prices — so the difference you see is the vehicles, not the assumptions. Gasoline and electricity are always priced separately; MPGe is never treated as MPG.

Vehicle A

or pick step by step

Vehicle A: Year

Vehicle A: Make

Vehicle A: Model

Selected: 2026 Rivian R1S Dual Standard (22in) · electric motor (208 kW ACPM) · Part-time 4WD · details

Vehicle B

or pick step by step

Vehicle B: Year

Vehicle B: Make

Vehicle B: Model

Selected: 2026 Tesla Model X · electric motor (246 and 251 kW ACPM) · AWD · details

Shared assumptions — applied to both vehicles

Miles driven per year12,000 mi

mi/year

Driving mix55% city / 45% highway

Electricity priceEPA avg

$/kWh

At these assumptions, the 2026 Tesla Model X costs $14.17 less per month ($170/year, $850 over five years) than the 2026 Rivian R1S Dual Standard (22in). This is the measured energy-cost difference only — not a statement that either vehicle is better.

2026 Rivian R1S Dual Standard (22in)2026 Tesla Model X

Per month

$73.55$59.38

Per year

$883$713

5 years

$4,415$3,565

Full cost and efficiency comparison between 2026 Rivian R1S Dual Standard (22in), 2026 Tesla Model X
Measure	2026 Rivian R1S Dual Standard (22in)	2026 Tesla Model X	Difference (A − B)
Cost per month	$73.55	$59.38	$14.17
Cost per year	$883	$713	$170
Cost over 5 years	$4,415	$3,565	$850
Cost per mile	7.4¢/mi	5.9¢/mi	1.5¢
Annual energy used	4,786 kWh	3,864 kWh	different units listed separately
EPA efficiency	39.9 kWh/100 mi	32.2 kWh/100 mi	—

2026 Rivian R1S Dual Standard (22in): EPA electricity consumption is measured from the wall outlet, so typical home AC charging losses are already included. Public DC fast-charging prices, extreme temperatures, and driving style can change real-world cost.

2026 Tesla Model X: EPA electricity consumption is measured from the wall outlet, so typical home AC charging losses are already included. Public DC fast-charging prices, extreme temperatures, and driving style can change real-world cost.