2004 Lexus IS vs 2021 BMW M340i — The Surprising Simulated Race Winner
On paper these two sedans should not be rivals. The 2021 BMW M340i is a modern, turbocharged, all-wheel-drive executive car built for punchy real-world pace, while the 2004 Lexus IS is a two-decade-old rear-drive sedan with a naturally aspirated bent for revs. Yet when DragGap runs its modelled head-to-head, the result is far from obvious. In this article we walk through the two cars as DragGap characterises them, explain how the simulated race unfolded, and compare the estimated straight-line numbers — making clear throughout that every performance figure here is modelled and estimated rather than measured on a real track.
Lexus IS
Lexus IS wins the modelled 1 km race by 2.041 seconds, with a 124.2 metre gap at the first finish.
DragGap comparison data
| DragGap result | 2004 Lexus IS | 2021 BMW M340i |
|---|---|---|
| Rated power | 298 kW | 285 kW |
| Horsepower | 400 hp | 382 hp |
| Mass | 1515 kg | 1770 kg |
| Drivetrain | Rear-Wheel Drive | AWD |
| 0–60 mph | 4.60 s | 3.89 s |
| 0–100 km/h | 4.75 s | 4.12 s |
| 1/4 mile | 12.240 s | 12.626 s |
| 1 km | 21.199 s | 23.241 s |
The Matchup at a Glance
DragGap frames this as a battle between two very different interpretations of the sports sedan. The Lexus IS from 2004 is represented with a naturally aspirated engine producing around 298 kW, or roughly 400 horsepower, driving the rear wheels through a mass of about 1,515 kg. The 2021 BMW M340i is the more modern machine on paper, with 285 kW (about 382 horsepower) sent to all four wheels, though it carries considerably more weight at around 1,770 kg.
What makes the comparison interesting is that the two cars reach their performance in opposite ways. The BMW leans on its all-wheel-drive traction and its contemporary launch characteristics to get moving quickly, while the lighter Lexus uses its power-to-weight advantage to build speed as the run goes on. DragGap records the Lexus as the overall winner of the modelled race, crossing the line roughly 124 metres ahead with a winning margin of about 2.04 seconds.
Powertrain and Chassis Compared
On power output the two are closer than their model years suggest. The 2004 Lexus IS is credited with 400 horsepower against the BMW's 382 horsepower, a difference of only a handful of ponies. The real separation is in how that power is delivered and how much metal each car has to haul.
The BMW M340i, at roughly 1,770 kg, is the heavier proposition, and its all-wheel-drive layout means more drivetrain to turn but also more grip off the line. The Lexus IS, at about 1,515 kg, is around 255 kg lighter and sends its power to the rear wheels only. Lighter weight and rear-drive delivery are exactly the kind of characteristics that reward a long, high-speed run — which is a big part of why the older car ends up ahead in DragGap's estimate.
How the Simulated Race Unfolded
It is worth emphasising that this is a modelled race, not a measured one. DragGap uses its simulation to estimate how each car would perform in a standing-start contest, and the headline result is the Lexus IS taking the win by approximately 124 metres and 2.04 seconds.
That margin tells a clear story about the shape of the race. The BMW is quick off the line thanks to its all-wheel drive, which is why its early acceleration figures are so strong. But as speeds climb, the heavier, less powerful-by-weight BMW starts to cede ground to the lighter Lexus, which keeps pulling through the higher gears. The result is a finish that looks dramatic on paper but is entirely a product of DragGap's simulation rather than any real-world test we carried out.
Straight-Line Numbers in Context
The estimated acceleration figures highlight how the two cars trade early pace for overall speed. DragGap models the BMW M340i reaching 0–100 km/h in about 4.12 seconds, quicker than the Lexus IS at roughly 4.75 seconds, reflecting the BMW's traction advantage off the mark.
Yet by the quarter mile the picture flips. The Lexus IS is estimated to complete the quarter mile in about 12.24 seconds, ahead of the BMW's roughly 12.63 seconds. The same pattern continues over a full kilometre, where the Lexus is modelled at about 21.20 seconds versus 23.24 seconds for the BMW. In other words, the BMW wins the first few car lengths, but the Lexus owns everything after that.
The Long Game: Top Speed and High-Speed Pull
The theme of the Lexus pulling away at high speed continues with the estimated top speeds. DragGap credits the 2004 Lexus IS with a modelled top speed of around 261.5 km/h, well ahead of the BMW M340i's roughly 221.9 km/h.
A gap of that size at the top end is exactly what you would expect from a lighter, rear-drive car with a similar power output to a heavier all-wheel-drive rival. All-wheel drive is excellent for launch grip, but the extra mass and drivetrain losses it brings tend to cost speed as the numbers climb. For anyone who values outright pace rather than just launch feel, the simulated numbers favour the older Lexus by a comfortable margin.
Which Car Should You Care About?
If your priority is a car that feels quick the moment you pull away, the 2021 BMW M340i's modelled launch is the more dramatic — its all-wheel drive gets it moving harder from a standstill, and its 0–100 km/h estimate is genuinely strong for a modern sport sedan.
If your priority is overall pace across a longer run, DragGap's simulation consistently points to the 2004 Lexus IS. It is lighter, rear-driven, and credited with both the quicker quarter-mile and the higher top speed. As with any simulated comparison, treat these as modelling rather than measured fact, but they do illustrate a real and interesting trade-off between launch grip and sustained speed.
The acceleration, quarter-mile and 1 km figures on this page are deterministic DragGap simulation estimates, not instrumented track measurements. Real results vary with vehicle specification, tyres, surface, weather and driver.
Frequently asked questions
Who won the simulated race between the 2004 Lexus IS and the 2021 BMW M340i?
In DragGap's modelled race, the 2004 Lexus IS is recorded as the winner, finishing roughly 124 metres ahead with a margin of about 2.04 seconds. This is an estimated result from simulation, not a measured test.
Is this a real instrumented test of these two cars?
No. All performance figures in this comparison are simulated, modelled and estimated by DragGap. No real-world or instrumented test was carried out, and the results should be treated as modelling rather than measured reality.
Why does the BMW M340i get off the line quicker than the Lexus IS?
The 2021 BMW M340i is modelled with all-wheel drive, which gives it more traction from a standing start. That is reflected in its quicker estimated 0–100 km/h time of about 4.12 seconds versus the Lexus's roughly 4.75 seconds.
Which car is quicker over the quarter mile in the simulation?
The 2004 Lexus IS is estimated to complete the quarter mile in about 12.24 seconds, ahead of the BMW M340i's roughly 12.63 seconds, despite the BMW being quicker off the line.
Is the 2004 Lexus IS really credited with 400 horsepower?
According to the canonical facts for this matchup, DragGap credits the Lexus IS with around 400 horsepower (about 298 kW), with the BMW M340i at roughly 382 horsepower (about 285 kW). These are the only figures used in this article.
Sources and method
- U.S. EPA FuelEconomy.gov for certified U.S. configuration and economy records.
- NHTSA vPIC for manufacturer-submitted make/model identity.
- Open Vehicle Specs (ODbL 1.0) for clearly labelled supplemental fields.
- DragGap methodology for the simulation assumptions, calibration and limitations.