- Brakes
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Front discs, servo-assisted, from the Series II in October 1960. Drums before that. On the earlier separate-era cars the only figure any source gives is relative: the Mark VI has forty per cent more lining area than the Mark V.
- Two Hawks
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Mark I–VIA, 1945–57 — separate era, transverse-leaf front until 1948, then coil IFS. Series I–IVA, 1957–67 — unitary, wrap-around screen, far more glass. Nothing body or glass crosses between them.
- October 1964 — the glass breakpoint
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Series IV: flatter roof, smaller rear window, an extra side window behind the rear doors. Windscreen, rear screen and side glass all split there. It also gained a rear anti-roll bar and synchromesh on bottom gear. The Super Snipe Series V changed the same way in the same month.
- The separate-era marks
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I 1945, 1944cc side-valve 56bhp, transverse-leaf IFS · II Sep 1947, column change · III Oct 1948, coil IFS and hypoid axle, Loewy body · IV spring 1951, 2267cc alloy head, 15in wheels · V Sep 1952, larger clutch, lowered bonnet line, wrap-around bumpers · VI Jun 1954, overhead-valve 2267, longer rear body · VIA Apr 1956, interior.
- The unitary series
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I May 1957, new unitary body · IA 1959, gear ratios and trim · II Oct 1960, servo front discs · III Sep 1962, larger tank, bigger rear window · IV Oct 1964, flat roof, six-light · IVA 1965, Borg Warner 35 automatic returns.
- The estate
- The Series I estate had the largest unitary bodyshell of any British-built car up to that point, with a horizontally split tailgate, lower half opening downwards, and the fuel filler concealed behind the offside rear reflector.
- Not claimed
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Brake type and size for the Mark I to VIA and the Series I — only the Mark VI’s relative lining increase is recorded. And earth polarity. One reference work does not list New Zealand among the Hawk’s assembly locations even though a New Zealand source refers to locally assembled Hawks — unresolved.
