On 19 August, PlayStation published a field guide to Gran Turismo 7's 1.71 update. It sorted four new cars into four personality categories and suggested a starting track for each. It is a friendly piece of writing and it is not wrong about anything.
Polyphony Digital published its own update notice for the same patch. That document describes a revised tyre model, reworked engine torque control, new suspension and steering physics, recalculated Performance Points across the entire game, and altered mechanical-damage thresholds. A reader who saw only the first post would have no idea their garage had changed.
What each document chose to lead with
The PlayStation post's framing is the four cars: a 1997 Toyota Chaser Tourer V and Mark II Tourer V from Used Cars, a 2008 Caterham Seven Superlight R500 and a 2025 Hyundai IONIQ 6 N from Brand Central. Each gets a category — street icon, sleeper pick, pure driver, next-gen performance — and a recommended first outing.
Polyphony's notice lists the same cars in two lines and then spends most of its length on "Other Improvements and Adjustments." The tyre algorithm was revised for wheel-slip behaviour, road-surface and rolling resistance, and heating and wear values. Grip loss behaves differently when Grip Reduction Off Track is set to Real. Steering geometry was re-optimised per car and damper characteristics reworked.
Recalculated PP touches every player who tunes
One line does more damage to existing player knowledge than the rest combined: Performance Points "have been recalculated for cars throughout the game." PP determines event eligibility. A build assembled to sit fractionally under a category ceiling was balanced against the previous formula.
Default setup values moved as well — initial suspension, differential and aerodynamic settings, and in several cases the adjustment ranges around them. Saved sheets for online lobbies and licence attempts are now working against different maths than when they were written.
None of this appears in the consumer-facing post, and none of it is hidden either. It is simply in the document that fewer people read.
"Three new World Circuits" turned out to mean three events
The clearest divergence is a phrase. PlayStation's post says the update introduces "three new World Circuits," which most readers will take as three new tracks. Polyphony's headline for the same content is "Four New Cars and Three Race Events," and its notice specifies that the following events are now part of World Circuits.
- Japanese FR Challenge 450 at Kyoto Driving Park — Yamagiwa
- European Clubman Cup 600 at Circuit de Barcelona-Catalunya, GP layout without the chicane
- World Touring Car 600 at Suzuka Circuit
All three run on circuits already in the game. The genuine track-side addition is smaller and sits elsewhere in the notes: Circuit Experience is now available on the Barcelona-Catalunya rallycross layout.
Neither document is being dishonest
It would be easy to call this spin. It is more usefully understood as two documents with different jobs. A platform blog is written to give a large, mostly casual audience a reason to open the game tonight; "four cars and a photo spot" does that, and "we revised the tyre heating model" does not.
Polyphony's notice is written for the players who will notice anyway, and it is admirably specific — down to which cars had maximum engine RPM revised and which now behave differently on forced downshifts. The gap is not deception. The gap is that the audience most affected by 1.71 is not the audience the widely syndicated post was written for.
Hardware is another section the consumer post never reaches. Auto Setup parameters were retuned for the Fanatec GT DD Pro, GT DD Extreme and Podium, and FullForce feedback is now supported on the GT DD Pro — both behind a device firmware update, with the Podium profile configured for Low Torque mode only. Standard controller play changed too: analog stick and d-pad steering response, throttle and brake input, and understeer vibration were all revised.
Mechanical damage moved as well. Collision-force thresholds that trigger damage were revised alongside the effect of damage on performance, and a new Championship option applies Light-style damage from less severe impacts. Traction control intervention and ABS slip-ratio and cornering-brake behaviour were both adjusted, which reaches players who never open a tuning menu at all.
The practical lesson for a live-service game
Two footnotes in the PlayStation post carry more weight than the car categories: the update requires an internet connection, and credits — earned or purchased — are required to buy the vehicles. The cars are not a gift, which is the single most common misreading of a free update that adds content.
For anything with a competitive ladder, the developer's own patch notes are the document that matters, and the platform holder's post is a trailer for it. In 1.71's case that distinction is the difference between knowing four cars arrived and knowing your fastest lap is no longer comparable to the one you set last week.
