My understanding is that many new vehicles that are 'sporty' or have sporty aspirations have artificial engine noise piped into the cabin through the audio system as others have noted above. Here's some historical context from Gemini for what it's worth:
Fake engine noise became an industry standard in
2011, when
Volkswagen introduced its
Soundaktor technology in the Golf GTI. To compensate for quieter engines and enhanced cabin insulation, manufacturers use this tech to pump digital or enhanced engine recordings through vehicle speakers. [
1,
2,
3,
4]
Dozens of manufacturers use active sound design, including: [
1,
2]