According to Japanese magazine Mag-X, the next-generation Lexus IS will debut in 2020 as a much larger sedan, with dimensions closer to the GS than the current IS model.

Using the numbers from the article, let’s make a comparison table with the IS old & new, the GS sedan, and the LC coupe for good measure:

Model Wheelbase Length Width Height New IS 2870 mm (113 in) 4730 mm (186.2 in) 1815 mm (71.5 in) 1425 mm (56.1 in) Current IS 2,800 mm (110.2 in) 4,681 mm (184.3 in) 1,810 mm (71.3 in) 1,430 mm (56.3 in) Current GS 2,850 mm (112.2 in) 4,879 mm (192.1 in) 1,840 mm (72.4 in) 1,455 mm (57.3 in) Current LC 2,870 mm (113.0 in) 4,760 mm (187.4 in) 1,920 mm (75.6 in) 1,345 mm (53.0 in)

If the Mag-X dimensions are correct, the next-gen IS could have a longer wheelbase and shorter overall length than the GS sedan. This discrepancy could mean shorter front & rear overhangs due to the adoption of the GA-L platform from the LC & LS.

The article suggests a new 2.4L four-cylinder turbo and a 2.5L hybrid as engine options, but there’s no mention of the 400+ horsepower IS 450 that was rumored a couple weeks back. Mag-X also throws in an IS F with the same 4.0L twin-turbo V8 that’s supposed to power the LC F coupe.

Here’s the full page from Mag-X, if anyone wants to translate the article in the comments: